Patent Publication Number: US-2015061130-A1

Title: Chip arrangement and a method for manufacturing a chip arrangement

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional of U.S. patent application Ser. No. 13/802,843, which was filed Mar. 14, 2013. This application is incorporated herein by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     Various aspects relate to a chip arrangement and a method for manufacturing a chip arrangement. 
     BACKGROUND 
     In manufacturing integrated circuits (ICs), the ICs, which may also be referred to as chips or dies, may be packaged prior to distribution and/or integration with other electronic assemblies. This packaging may include encapsulating the chips in a material, and providing electrical contacts on the exterior of the package to provide an interface to the chip. 
     As the demand for greater capabilities and features of ICs increases, a plurality of chips may be stacked onto each other to form a single IC package. This process of stacking a plurality of chips onto each other may be referred to as die stacking, and the result may be referred to as a die stack. Die stacking may increase the number of chips that may be housed within a single IC package for a given footprint. Consequently, real estate on a printed circuit board may be conserved and/or a board assembly process may be simplified. Besides saving space, die stacking may result in better electrical performance of the device, since the shorter routing of interconnections between chips that are stacked onto each other may result in faster signal propagation and reduction in noise and cross-talk. 
     Whilst the above-identified features of a die stack may be advantageous, stacking a plurality of chips onto each other may reduce an area available on the die stack for electrical routing and/or interconnects between the plurality of chips of the die stack and, for example, a printed circuit board. This may, for example, increase a complexity of a design of an IC package having a die stack. New ways of stacking chips and/or packaging stacked chips may be needed. 
     SUMMARY 
     A chip arrangement is provided, which may include: a first semiconductor chip having a first side and a second side opposite the first side; a second semiconductor chip having a first side and a second side opposite the first side, the second semiconductor chip disposed at the first side of the first semiconductor chip and electrically coupled to the first semiconductor chip, the first side of the second semiconductor chip facing the first side of the first semiconductor chip; an encapsulation layer at least partially encapsulating the first semiconductor chip and the second semiconductor chip, the encapsulation layer having a first side and a second side opposite the first side, the second side facing in a same direction as the second side of the second semiconductor chip; and an interconnect structure disposed at least partially within the encapsulation layer and electrically coupled to at least one of the first and second semiconductor chips, wherein the interconnect structure may extend to the second side of the encapsulation layer. 
     A method for manufacturing a chip arrangement is provided, which may include: providing a first semiconductor chip having a first side and a second side opposite the first side; disposing a second semiconductor chip over the first side of the first semiconductor chip, the second semiconductor chip having a first side and a second side opposite the first side, the first side of the second semiconductor chip facing the first side of the first semiconductor chip, wherein the second semiconductor chip may be electrically coupled to the first semiconductor chip; forming an encapsulation layer to at least partially encapsulate the first and second semiconductor chips, the encapsulation layer having a first side and a second side opposite the first side, the second side of the encapsulation layer facing in a same direction as the second side of the second semiconductor chip; and forming an interconnect structure at least partially within the encapsulation layer, wherein the interconnect structure may be electrically coupled to at least one of the first and second semiconductor chips and extends to the second side of the encapsulation layer. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the drawings, like reference characters generally refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. In the following description, various aspects of the invention are described with reference to the following drawings, in which: 
         FIG. 1A  and  FIG. 1B  show cross-sectional views of conventional chip arrangements including at least one first chip stacked over a second chip. 
         FIG. 2  shows a cross-sectional view of a chip arrangement. 
         FIG. 3  shows a cross-sectional view of a chip arrangement including a filling material disposed between a first semiconductor chip and a second semiconductor chip. 
         FIG. 4  shows a cross-sectional view of a chip arrangement including a third semiconductor chip. 
         FIG. 5  shows a cross-sectional view of a chip arrangement including at least one through-via and a metallization layer. 
         FIG. 6  shows a method for manufacturing a chip arrangement. 
         FIG. 7A  to  FIG. 7I  show a process flow for a method for manufacturing a chip arrangement. 
     
    
    
     DESCRIPTION 
     The following detailed description refers to the accompanying drawings that show, by way of illustration, specific details and aspects in which the invention may be practised. These aspects are described in sufficient detail to enable those skilled in the art to practice the invention. Other aspects may be utilized and structural, logical, and electrical changes may be made without departing from the scope of the invention. The various aspects are not necessarily mutually exclusive, as some aspects can be combined with one or more other aspects to form new aspects. Various aspects are described for structures or devices, and various aspects are described for methods. It may be understood that one or more (e.g. all) aspects described in connection with structures or devices may be equally applicable to the methods, and vice versa. 
     The word “exemplary” is used herein to mean “serving as an example, instance, or illustration”. Any aspect or design described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects or designs. 
     The word “over”, used herein to describe forming a feature, e.g. a layer “over” a side or surface, may be used to mean that the feature, e.g. the layer, may be formed “directly on”, e.g. in direct contact with, the implied side or surface. The word “over”, used herein to describe forming a feature, e.g. a layer “over” a side or surface, may be used to mean that the feature, e.g. the layer, may be formed “indirectly on” the implied side or surface with one or more additional layers being arranged between the implied side or surface and the formed layer. 
     In like manner, the word “cover”, used herein to describe a feature disposed over another, e.g. a layer “covering” a side or surface, may be used to mean that the feature, e.g. the layer, may be disposed over, and in direct contact with, the implied side or surface. The word “cover”, used herein to describe a feature disposed over another, e.g. a layer “covering” a side or surface, may be used to mean that the feature, e.g. the layer, may be disposed over, and in indirect contact with, the implied side or surface with one or more additional layers being arranged between the implied side or surface and the covering layer. 
     The terms “coupled” and/or “electrically coupled” and/or “connected” and/or “electrically connected”, used herein to describe a feature being connected to at least one other implied feature, are not meant to mean that the feature and the at least one other implied feature must be directly coupled or connected together; intervening features may be provided between the feature and at least one other implied feature. 
     Directional terminology, such as e.g. “upper”, “lower”, “top”, “bottom”, “left-hand”, “right-hand”, etc., may be used with reference to the orientation of figure(s) being described. Because components of the figure(s) may be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that structural or logical changes may be made without departing from the scope of the invention. 
     Chips (which may also be referred to as “dies”) may have to be packaged prior to distribution and/or integration with other electronic devices, such as circuit boards (e.g. printed circuit boards), other chips and/or other chip packages. Packaging a chip (or die) may include encapsulating the chip (or die) in a material (e.g. a plastic material), and providing electrical contacts (e.g. solder balls and/or bumps, for example micro-bumps) at a surface (e.g. an exterior surface) of the chip package. 
     At least one other chip may be connected (e.g. electrically connected) to the chip of the chip package via the electrical contacts (e.g. bumps, for example micro-bumps). For example, the chip package may be stacked (e.g. vertically stacked) over at least one other chip, and the at least one other chip may be connected (e.g. electrically connected) to the chip of the chip package via the electrical contacts (e.g. bumps, for example micro-bumps). 
       FIG. 1A  shows a cross-sectional view of a conventional fan-in chip arrangement  100  including a first chip  102  stacked over a second chip  104 . 
     The first chip  102  may include, or may be, a chip (or die) and/or a passive device (e.g. a resistor and/or capacitor and/or inductor). 
     The chip arrangement  100  may include a plurality of solder balls  112  and/or a plurality of bumps  114  (e.g. micro-bumps). The plurality of solder balls  112  and/or the plurality of bumps  114  (e.g. micro-bumps) may be formed at (e.g. disposed at) a side  102   a  of the first chip  102 . 
     The first chip  102  may be electrically connected to at least one solder ball of the plurality of solder balls  112  and/or at least one bump of the plurality of bumps  114  by means of a redistribution layer (RDL)  116 . The RDL  116  may, for example, be partially or fully disposed within an insulating layer  117  (e.g. a dielectric layer). The RDL  116  may redistribute and/or re-map electrical connections from the first chip  102  to the plurality of solder balls  112  and/or to the plurality of bumps  114 . 
     The chip arrangement  100  may include a second chip  104 , which may be arranged below the first chip  102 . For example, the first chip  102  may be stacked over the second chip  104 . The side  102   a  of the first chip  102  may be an active side  102   a  of the first chip  102 , and the second chip  104  may have an active side  104   a . The active side  102   a  of the first chip  102  may face the active side  104   a  of the second chip  104 . 
     The first chip  102  may be coupled (e.g. electrically coupled) to the second chip  104 , for example, via the plurality of bumps  114  (e.g. micro-bumps). For example, the active side  102   a  of the first chip  102  may be coupled (e.g. electrically coupled) to the active side  104   a  of the second chip  104 . Since the active sides  102   a ,  104   a  of the first and second chips  102 ,  104  may face each other, the plurality of bumps  114  provided between the first chip  102  and the second chip  104  may have a short height. 
     The arrangement formed by the first chip  102  and the second chip  104  may be referred to as an mother-daughter die WLB (wafer level ball grid array) package. The first chip  102  may, for example, be referred to as a mother die or a carrier die, and the second chip  104  may be referred to as a daughter die. The first chip  102  (e.g. mother die) may, for example, carry the second chip  104  (e.g. daughter die) on its active side  102   a . The second chip  104  (e.g. daughter die) may be smaller than the first chip  102  (e.g. mother die). For example, a lateral extent L2 of the second chip  104  (e.g. daughter die) may be smaller than a lateral extent L1 of the first chip  102  (e.g. mother die). By way of another example, a thickness T2 of the second chip  104  (e.g. daughter die) may be smaller than a thickness T1 of the first chip  102  (e.g. mother die). 
     The mother-daughter die WLB package shown in  FIG. 1A  may be electrically connected to a printed circuit board (PCB)  118 , for example, via the plurality of solder balls  112 . As shown in  FIG. 1A , there may be a region A within the lateral extent L1 of the first chip  102  that may be occupied by the second chip  104  (e.g. daughter die). Since the region A of the first chip  102  may be occupied by the second chip  104 , the plurality of solder balls  112  may not be formed at the region A. In a fan-in wafer level package where the plurality of solder balls  112  may be required to fit within the lateral extent L1 of the first chip  102  (e.g. mother die), occupation of the region A by the second chip  104  (e.g. daughter die) may limit the number of solder balls  112  that may be provided for the electrical connection between the first chip  102  (e.g. mother die) and the PCB  118 . 
     Furthermore, the region A of the first chip  102  (e.g. mother die) may not be available for electrical routing since it is occupied by the second chip  104  (e.g. daughter die). In a fan-in wafer level package where the electrical routing may be required to fit within the lateral extent L1 of the first chip  102  (e.g. mother die), occupation of the region A by the second chip  104  (e.g. daughter die) may limit the area available for electrical routing. This may increase the design complexity of the mother-daughter die WLB package. 
     The second chip  104  (e.g. daughter die) may need to have a small lateral extent L2 in order to provide a space S around the second chip  104  (e.g. daughter die) in order to accommodate the plurality of solder balls  112 . In a fan-in wafer level package where the electrical routing and/or the plurality of solder balls  112  may be required to fit within the lateral extent L1 of the first chip  102  (e.g. mother die), the space S may be limited. In turn, this may limit the size of the second chip  104  (e.g. daughter die) that may be used in an mother-daughter die WLB package. 
     The second chip  104  (e.g. daughter die) may need to be thinned to a desired thickness T2 in order to fit between the first chip  102  (e.g. mother die) and the PCB  118 . For example, there may be a need to provide a clearance C between the second chip  104  (e.g. daughter die) and the PCB  118 . Accordingly, the second chip  104  (e.g. daughter die) may need to be thinned prior to attaching it to the first chip  102  (e.g. mother die). Picking up a thinned second chip  104  (e.g. daughter die) and placing it at a side (e.g. active side  102   a ) of the first chip  102  (e.g. mother die) may be difficult. 
     A reflow process may be performed in order to connect the second chip  104  (e.g. daughter die) to the first chip  102  (e.g. via the plurality of bumps  114 ). It may be difficult to perform a reflow process on the thinned second chip  104  (e.g. daughter die). Furthermore, performing the reflow process on the second chip  104  (e.g. daughter die) with a small thickness T2 may decrease yield, thus increasing a cost of manufacturing the chip arrangement  100 . 
       FIG. 1B  shows a cross-sectional view of a conventional fan-out chip arrangement  101  including at least one first chip  102 - 1 ,  102 - 2 ,  102 - 3  stacked over a second chip  104 . 
     Reference signs in  FIG. 1B  that are the same as in  FIG. 1A  denote the same or similar elements as in  FIG. 1A . Thus, those elements will not be described in detail again here; reference is made to the description above. Differences between  FIG. 1B  and  FIG. 1A  are described below. 
     As shown in  FIG. 1B , a fan-out chip arrangement  101  may include at least one first chip  102 - 1 ,  102 - 2 ,  102 - 3  embedded in an encapsulation  126 . The RDL  116  may redistribute and/or re-map electrical connections from the at least one first chip  102 - 1 ,  102 - 2 ,  102 - 3  to the plurality of solder balls  112  and/or to the plurality of bumps  114 . 
     In a fan-out chip arrangement, such as the chip arrangement  101 , the plurality of solder balls  112  and/or to the plurality of bumps  114  may extend beyond the lateral extent L1 of the at least one first chip  102 - 1 ,  102 - 2 ,  102 - 3 . Nonetheless, the region A of the lateral extent L3 of the chip arrangement  101  may not be available for electrical routing and/or for forming the plurality of solder balls  112  and/or the plurality of bumps  114  due to occupation of the region A by the second chip  104 . In other words, a backside of the second chip  104  (e.g. daughter chip) may not be used for electrical routing and/or for forming the plurality of solder balls  112  and/or the plurality of bumps  114 . 
     In view of the above-mentioned features of the fan-in chip arrangement  100  and the fan-out chip arrangement  101 , the following needs may be identified: 
     There may be a need to provide a chip arrangement in which a daughter die does not limit the number of solder balls that may be provided for an electrical connection to or from a mother die, whilst preventing a large increase in the total size (e.g. total lateral extent) of a fan-out chip arrangement. 
     There may be a need to provide a chip arrangement in which an area available for electrical routing on a mother die is not limited by a presence of a daughter die. 
     There may be a need to provide a chip arrangement in which a plurality of solder balls may be formed at a side (e.g. a backside) of a daughter die. 
     There may be a need to provide a chip arrangement in which electrical routing may be formed at a side (e.g. a backside) of a daughter die. 
     There may be a need to provide a chip arrangement in which a daughter die may be thinned to a desired thickness after attaching it to a mother die. 
     Such a chip arrangement may, for example, be provided by the chip arrangement shown in  FIG. 2 . 
       FIG. 2  shows a cross-sectional view of a chip arrangement  200 . 
     The chip arrangement  200  may include a first semiconductor chip  202 , a second semiconductor chip  204 , an encapsulation layer  206 , and an interconnect structure  208 . 
     Only one first semiconductor chip  202  is shown as an example, however the number of first semiconductor chips  202  may be greater than one, and may, for example, be two, three, four, five, etc. For example, the chip arrangement  200  may include a plurality of first semiconductor chips  202 , which may, for example, be arranged laterally adjacent to each other. 
     In like manner, only one second semiconductor chip  204  is shown as an example, however the number of second semiconductor chips  204  may be greater than one, and may, for example, be two, three, four, five, etc. For example, the chip arrangement  200  may include a plurality of second semiconductor chips  204 , which may, for example, be arranged laterally adjacent to each other. 
     The first semiconductor chip  202  and/or the second semiconductor chip  204  may include, or may be, a chip (or die) for use in MEMS (micro-electromechanical systems) applications and/or logic applications and/or memory applications and/or power applications, although chips for use in other applications may be possible as well. The first semiconductor chip  202  and/or the second semiconductor chip  204  may include, or may be, a passive component (e.g. a resistor and/or capacitor and/or inductor). 
     The first semiconductor chip  202  and/or the second semiconductor chip  204  may include a semiconductor substrate, which may include, or may consist of, a semiconductor material. The semiconductor material may include, or may be, at least one material selected from a group of materials, the group consisting of: silicon, germanium, gallium nitride, gallium arsenide, and silicon carbide, although other materials may be possible as well. 
     The first semiconductor chip  202  may, for example, be a mother die (which may also be referred to as a carrier die). The second semiconductor chip  204  may, for example, be a daughter die that may, for example, be coupled (e.g. electrically coupled) to the first semiconductor chip  202  (e.g. mother die or carrier die). 
     The first semiconductor chip  202  may have a first side  202   a  and a second side  202   b  opposite the first side  202   a . The first semiconductor chip  202  may further include at least one sidewall  202   c . The first side  202   a  and the second side  202   b  of the first semiconductor chip  202  may include, or may be, a frontside and a backside of the first semiconductor chip  202 , respectively. By way of another example, the first side  202   a  of the first semiconductor chip  202  may include, or may be, an active side of the first semiconductor chip  202 . By way of yet another example, the first side  202   a  and the second side  202   b  of the first semiconductor chip  202  may include, or may be, a bottom surface and a top surface of the first semiconductor chip  202 , respectively. 
     The second semiconductor chip  204  may have a first side  204   a  and a second side  204   b  opposite the first side  204   a . The second semiconductor chip  204  may further include at least one sidewall  204   c . The first side  204   a  and the second side  204   b  of the second semiconductor chip  204  may include, or may be, a frontside and a backside of the second semiconductor chip  204 , respectively. By way of another example, the first side  204   a  of the second semiconductor chip  204  may include, or may be, an active side of the second semiconductor chip  204 . By way of yet another example, the first side  204   a  and the second side  204   b  of the second semiconductor chip  204  may include, or may be, a bottom surface and a top surface of the second semiconductor chip  204 , respectively. 
     The second semiconductor chip  204  may be disposed at the first side  202   a  (e.g. frontside) of the first semiconductor chip  202 . For example, in the view shown in  FIG. 2 , the second semiconductor chip  204  may be disposed below the first side  202   a  (e.g. frontside) of the first semiconductor chip  202 . In another view, for example, the second semiconductor chip  204  may be disposed over the first side  202   a  (e.g. frontside) of the first semiconductor chip  202 . 
     The first semiconductor chip  202  and the second semiconductor chip  204  may be arranged in a face-to-face arrangement in the chip arrangement  200 . For example, the first side  204   a  of the second semiconductor chip  204  may face the first side  202   a  of the first semiconductor chip  202 , as shown in  FIG. 2 . As described above, the first side  202   a  of the first semiconductor chip  202  may be a frontside of the first semiconductor chip  202 , and the first side  204   a  of the second semiconductor chip  204  may be a frontside of the second semiconductor chip  204 . In such an example, the first semiconductor chip  202  and the second semiconductor chip  204  may be arranged in a frontside-to-frontside arrangement. By way of another example, the first side  202   a  of the first semiconductor chip  202  may be an active side of the first semiconductor chip  202 , and the first side  204   a  of the second semiconductor chip  204  may be an active side of the second semiconductor chip  204 . In such an example, the active sides of the first semiconductor chip  202  and the second semiconductor chip  204  may face each other. 
     The first semiconductor chip  202  may be larger than the second semiconductor chip  204 . For example, the first semiconductor chip  204  may have a thickness T1, which may be measured in a direction perpendicular to the first surface  202   a  of the first semiconductor chip  202 . The second semiconductor chip  204  may have a thickness T2, which may be measured in a direction perpendicular to the first surface  204   a  of the second semiconductor chip  204 . 
     The first semiconductor chip  202  may be larger than the second semiconductor chip  204  in that the thickness T1 of the first semiconductor chip  202  may be larger than the thickness T2 of the second semiconductor chip  204 . The thickness T2 of the second semiconductor chip  204  may, for example, be less than or equal to about 100 μm, for example less than or equal to about 75 μm, for example less than or equal to about 50 μm, for example less than or equal to about 20 μm, for example less than or equal to about 15 μm, although other thicknesses may be possible as well. 
     The first semiconductor chip  202  may have a lateral extent L1 which may be measured in a direction perpendicular to the thickness T1, and the second semiconductor chip  204  may have a lateral extent L2 which may be measured in a direction perpendicular to the thickness T2. The first semiconductor chip  202  may be larger than the second semiconductor chip  204  in that the lateral extent L1 of the first semiconductor chip  202  may be larger than the lateral extent L2 of the second semiconductor chip  204 , as shown in  FIG. 2 . The lateral extent L1 may be a length of the first semiconductor chip  202 , and the lateral extent L2 may be a length of the second semiconductor chip  204 . Accordingly, the first semiconductor chip  202  may have a greater length than the second semiconductor chip  204 . 
     The first semiconductor chip  202  may be larger than the second semiconductor chip  204  in that a chip area of the first semiconductor chip  202  may be larger than a chip area of the second semiconductor  204 . A chip area may, for example, refer to an area of a side of the first semiconductor chip  202  and/or the second semiconductor chip  204 . For example, an area of the first side  202   a  (e.g. active side) of the first semiconductor chip  202  may be larger than an area of the first side  204   a  (e.g active side) of the second semiconductor chip  204 . 
     The second semiconductor chip  204 , which may be smaller than the first semiconductor chip  202 , may be disposed laterally within a boundary of the first semiconductor chip  202 . For example, the lateral extent L2 of the second semiconductor chip  204  may be within the lateral extent L1 of the first semiconductor chip  202 , as shown in  FIG. 2 . In other words, the first semiconductor chip  202  (e.g. a boundary of the first semiconductor chip  202 ) may extend laterally beyond the second semiconductor chip  204  (e.g. a boundary of the second semiconductor chip  204 ). 
     The first semiconductor chip  202  and the second semiconductor chip  204  may be coupled (e.g. electrically coupled) to each other. For example, the first semiconductor chip  202  may be integrated (e.g. vertically integrated) with the second semiconductor chip  204 . The first semiconductor chip  202  and the second semiconductor chip  204  may be coupled (e.g. electrically coupled) to each other via, for example, at least one electrical connector (e.g. interconnect, e.g. chip interconnect)  210 . In other words, the chip arrangement  200  may include at least one electrical connector (e.g. interconnect, e.g. chip interconnect)  210 , which may couple (e.g. electrically couple) the first semiconductor chip  202  to the second semiconductor chip  204 . The at least one electrical connector  210  may, for example, be disposed between the first side  202   a  (e.g. active side) of the first semiconductor chip  202  and the first side  204   a  (e.g. active side) of the second semiconductor chip  204 , as shown in  FIG. 2 . 
     The first semiconductor chip  202  may include at least one electrically conductive contact  202   d  that may be disposed at the first side  202   a  (e.g. active side) of the first semiconductor chip  202 . The at least one electrically conductive contact  202   d  may be coupled (e.g. electrically coupled) to the at least one electrical connector  210  disposed between the first side  202   a  (e.g. active side) of the first semiconductor chip  202  and the first side  204   a  (e.g. active side) of the second semiconductor chip  204 . The first semiconductor chip  202  and the second semiconductor chip  204  may be coupled (e.g. electrically coupled) to each other via, for example, the at least one electrical connector  210 . The at least one electrical connector  210  may, in turn, be coupled (e.g. electrically coupled) to at least one electrically conductive contact  202   d  that may be disposed at the first side  202   a  (e.g. active side) of the first semiconductor chip  202 . The at least one electrical connector  210  may, for example, include or be at least one bump, or the like. The coupling (e.g. electrical coupling) between the at least one electrical connector  210  and the at least one electrically conductive contact  202   d  of the first semiconductor chip  202  may be a direct coupling (e.g. electrical coupling), or may include at least one intervening structure. The at least one intervening structure may include, or may be, a redistribution structure or a metallization (e.g. an under-bump metallization), although other intervening structures may be possible as well. 
     The second semiconductor chip  204  may include at least one electrically conductive contact  204   d  that may be disposed at the first side  204   a  (e.g. active side) of the second semiconductor chip  204 . The at least one electrically conductive contact  204   d  may be coupled (e.g. electrically coupled) to the at least one electrical connector  210  disposed between the first side  202   a  (e.g. active side) of the first semiconductor chip  202  and the first side  204   a  (e.g. active side) of the second semiconductor chip  204 . In other words, the first semiconductor chip  202  and the second semiconductor chip  204  may be coupled (e.g. electrically coupled) to each other via, for example, at least one electrical connector  210 , which may, in turn, be coupled (e.g. electrically coupled) to at least one electrically conductive contact  204   d  that may be disposed at the first side  204   a  of the second semiconductor chip  204 . 
     The at least one electrically conductive contact  202   d  of the first semiconductor chip  202  and/or the at least one electrically conductive contact  204   d  of the second semiconductor chip  204  may include, or may be, a pad (e.g. a bonding pad). The at least one electrically conductive contact  202   d  of the first semiconductor chip  202  and/or the at least one electrically conductive contact  204   d  of the second semiconductor chip  204  may, for example, provide an interface (e.g. an electrical interface) for the first semiconductor chip  202  and/or the second semiconductor chip  204 , respectively. In other words, signals (e.g. electrical signals, power supply potentials, ground potentials, etc.) may be exchanged with the first semiconductor chip  202  and/or the second semiconductor chip  204  via the at least one electrically conductive contact  202   d  and/or the at least one electrically conductive contact  204   d , respectively. 
     As described above, the first side  202   a  of the first semiconductor chip  202  may be a frontside of the first semiconductor chip  202 , and the first side  204   a  of the second semiconductor chip  204  may be a frontside of the second semiconductor chip  204 . In a face-to-face arrangement, a shorter interconnect may, for example, be possible between the first semiconductor  202  and the second semiconductor  204 . In other words, a length L of the at least one electrical connector  210  disposed between the first side  202   a  of the first semiconductor chip  202  and the first side  204   a  of the second semiconductor chip  204  may be shorter. 
     The at least one electrical connector  210  may include, or may consist of, at least one electrically conductive material selected from a group of electrically conductive materials, the group consisting of: a metal or metal alloy. For example, the at least one electrical connector  210  may consist of a solder material (e.g. may contain tin, silver, nickel, conductive paste or copper or an alloy of one or more of the listed materials). By way of another example, the at least one electrical connector  210  may consist of copper, palladium, titanium, tungsten, nickel, gold, aluminum or a conductive paste or a stack or an alloy including or consisting of at least one of the listed metals. 
     The at least one electrical connector  210  may include, or may be, at least one of a bump and a pillar, although other electrical connectors may be possible as well. By way of an example, the at least one electrical connector  210  may include, or may be, a bump, for example, a solder bump and/or a micro-bump (e.g. micro solder bump) and/or a flip-chip bump. By way of another example, the at least one electrical connector  210  may include, or may be, a pillar bump (e.g. a metal-pillar bump, for example a copper-pillar bump). 
     The chip arrangement  200  may include an encapsulation layer  206 . The encapsulation layer  206  may at least partially encapsulate the first semiconductor chip  202  and the second semiconductor chip  204 . For example, the encapsulation layer  206  may enclose the second semiconductor chip  204  from at least one sidewall  204   c  and the first side  204   a , and may enclose the first semiconductor chip  202  from at least one sidewall  202   c  and the first side  202   a , as shown in  FIG. 2 . 
     The encapsulation layer  206  may have a first side  206   a  and a second side  206   b  opposite the first side  206   a . The first side  206   a  of the encapsulation layer  206  may, for example, be a backside of the chip arrangement  200 . The second side  206   b  of the encapsulation layer  206  may, for example, be a frontside of the chip arrangement  200 . 
     The first side  206   a  of the encapsulation layer  206  may face in a same direction as the second side  202   b  (e.g. backside) of the first semiconductor chip  202 . For example, as shown in  FIG. 2 , the first side  206   a  of the encapsulation layer  206  and the second side  202   b  (e.g. backside) of the first semiconductor chip  202  may face away from the first side  202   a  (e.g. frontside) of the first semiconductor chip  202 . The first side  206   a  of the encapsulation layer  206  may be at least substantially flush with the second side  202   b  (e.g. backside) of the first semiconductor chip  202 . In other words, the first side  206   a  of the encapsulation layer  206  and the second side  202   b  (e.g. backside) of the first semiconductor chip  202  may at least form a substantially flat surface of the chip arrangement  200 , as shown in  FIG. 2 . 
     The second side  206   b  of the encapsulation layer  206  may face in a same direction as the second side  204   b  (e.g. backside) of the second semiconductor chip  204 . For example, as shown in  FIG. 2 , the second side  206   b  of the encapsulation layer  206  and the second side  204   b  (e.g. backside) of the second semiconductor chip  204  may face away from the first side  202   a  of the first semiconductor chip  202 . The second side  206   b  of the encapsulation layer  206  may be at least substantially flush with the second side  204   b  (e.g. backside) of the second semiconductor chip  204 . In other words, the second side  206   b  of the encapsulation layer  206  and the second side  204   b  of the second semiconductor chip  204  may form an at least substantially flat surface of the chip arrangement  200 , as shown in  FIG. 2 . Alternatively, the encapsulation layer  206  may cover the second side  204   b  (e.g. backside) of the second semiconductor chip  204 . 
     The encapsulation layer  206  may include, or may consist of, a material that may be different from the first semiconductor chip  202  and the second semiconductor chip  204 . The encapsulation layer  206  may include, or may consist of, an insulating material. The encapsulation layer  206  may include, or may consist of, a molding material (namely, a material that may be molded by means of a molding process). By way of another example, the encapsulation layer  206  may include, or may consist of, a laminate material (namely, a material that may be laminated by means of a lamination process). 
     The encapsulation layer  206  may include, or may consist of, at least one material selected from a group of materials, the group consisting of: a plastic material, a thermoplastic material, and a filler material (e.g. including, or consisting of, at least one of a silica filler, a glass filler, a glass cloth, rubber and metal particles), although other materials may be possible as well. By way of an example, the encapsulation layer  206  may include, or may consist of, a plastic material (e.g. an epoxy resin, such as, for example, a thermosetting molding compound). By way of another example, the encapsulation layer  206  may include, or may consist of, a plastic material (e.g. a thermoplastic, such as, for example, a high purity fluoropolymer). 
     The chip arrangement  200  may include an interconnect structure  208 . The interconnect structure  208  may be disposed at least partially within the encapsulation layer  206 , as shown in  FIG. 2 . For example, the interconnect structure  208  may include a part  208   a ,  208   b  that may be disposed within the encapsulation layer  206 , and may include a part  208   c ,  208   d  that may be disposed outside the encapsulation layer  206 . 
     The interconnect structure  208  may, for example, include, or may consist of, at least one electrically conductive material, e.g. at least one metal and/or metal alloy. The at least one electrically conductive material may be selected from a group of electrically conductive materials, the group consisting of: aluminum, tungsten, titanium, copper, nickel, palladium and gold or a conductive paste (polymer, filled with electrically conductive particles), although other electrically conductive materials may be possible as well. 
     The interconnect structure  208  may, for example, redistribute and/or re-map electrical connections from the first side  202   a  of the first semiconductor chip  202  and/or the first side  204   a  of the second semiconductor chip  204  to the second side  206   b  of the encapsulation layer  206 . Accordingly, the interconnect structure  208  may, for example, extend to the second side  206   b  of the encapsulation layer  206 . 
     The interconnect structure  208  may extend to the second side  206   b  of the encapsulation layer  206  from the first side  202   a  of the first semiconductor chip. For example, the interconnect structure  208  may include a part  208   a  that may be disposed between the first side  202   a  of the first semiconductor chip  202  and the first side  204   a  of the second semiconductor chip  204 . Accordingly, the interconnect structure  208  may extend from between the first side  202   a  of the first semiconductor chip  202  and the first side  204   a  of the second semiconductor chip  204  to the second side  206   b  of the encapsulation layer  206 . The part  208   a  of the interconnect structure  208  may include, or may be, a redistribution layer (RDL) disposed at the first side  202   a  of the first semiconductor chip  202 . The part  208   a  (e.g. RDL) may be configured to redistribute and/or re-map electrical connections from the first side  202   a  of the first semiconductor chip  202  and/or the first side  204   a  of the second semiconductor chip  204  to the second side  206   b  of the encapsulation layer  206 . 
     By way of another example, the interconnect structure  208  may include a part  208   b  that may extend from the first side  202   a  of the first semiconductor chip  202  to the second side  206   b  of the encapsulation layer  206 . Accordingly, the interconnect structure  208  may extend from the first side  202   a  of the first semiconductor chip  202  to the second side  206   b  of the encapsulation layer  206 . The part  208   b  of the interconnect structure  208  may include, or may be, at least one metal pillar extending from the first side  202   a  of the first semiconductor chip  202  to the second side  206   b  of the encapsulation layer  206 . The part  208   b  (e.g. at least one metal pillar) of the interconnect structure  208  may be disposed laterally adjacent to the second semiconductor chip  204 , and may be coupled (e.g. electrically coupled) to the part  208   a  (e.g. RDL) of the interconnect structure  208 , as shown in  FIG. 2 . 
     The interconnect structure  208  may further extend over, for example, the second side  204   b  of the second semiconductor chip  204 . For example, the interconnect structure  208  may include a part  208   c ,  208   d  that may be formed at the second side  204   b  of the second semiconductor chip  204 , and may extend over the second side  204   b  of the second semiconductor chip  204 , as shown in  FIG. 2 . The part  208   c ,  208   d  of the interconnect structure  208  may be coupled (e.g. electrically coupled) to the part  208   b  (e.g. at least one metal pillar) and to the part  208   a  (e.g. RDL). The part  208   c ,  208   d  of the interconnect structure  208  extending over the second side  204   b  of the second semiconductor chip  204  may, for example, be a redistribution layer (RDL) (e.g. a frontside RDL) that may redistribute and/or re-map electrical connections from the first side  202   a  of the first semiconductor chip  202  and/or the first side  204   a  of the second semiconductor chip  204  to the second side  204   b  of the second semiconductor chip  204 . 
     The interconnect structure  208  may be coupled (e.g. electrically coupled) to the first semiconductor chip  202  and/or the second semiconductor chip  204 . As described above, the first semiconductor chip  202  and the second semiconductor chip  204  may be coupled (e.g. electrically coupled) via at least one electrical connector  210 . Accordingly, the interconnect structure  208 , which may be coupled (e.g. electrically coupled) to the first semiconductor chip  202  and/or the second semiconductor chip  204 , may be coupled (e.g. additionally coupled) to the at least one electrical connector  210 . 
     The chip arrangement  200  may include at least one electrical connector  212  disposed at the second side  206   b  of the encapsulation layer  206 . The at least one electrical connector  212  may include, or may consist of, at least one electrically conductive material selected from a group of electrically conductive materials, the group consisting of: a metal or metal alloy. For example, the at least one electrical connector  212  may consist of a solder material (e.g. an alloy of tin, silver, and copper). By way of another example, the at least one electrical connector  212  may consist of copper, palladium, titanium, tungsten, nickel, gold, aluminum or a conductive paste or a stack or an alloy including or consisting of at least one of the listed metals. 
     The at least one electrical connector  212  may be coupled (e.g. electrically coupled) to the interconnect structure  208 . For example, as described above, the interconnect structure  208  may include a part  208   c ,  208   d  (e.g. RDL, for example, a frontside RDL) extending over the second side  204   b  of the second semiconductor chip  204 . The at least one electrical connector  212  disposed at the second side  206   b  of the encapsulation layer  206  may be coupled (e.g. electrically coupled) to the part  208   c ,  208   d  (e.g. RDL, for example, frontside RDL) of the interconnect structure  208  extending over the second side  204   b  of the second semiconductor chip  204 . 
     The at least one electrical connector  212  may include, or may be, at least one of a ball, a bump and a pillar. The at least one electrical connector  212  may, for example, provide an interface (e.g. a ball grid array of solder balls) for the chip arrangement  200 . In other words, signals (e.g. electrical signals, power supply potentials, ground potentials, etc.) may be exchanged with the first semiconductor chip  202  and/or the second semiconductor chip  204  of the chip arrangement  200  via the at least one electrical connector  212 . 
     The chip arrangement  200  may include an insulating layer  214  formed at the second side  206   b  of the encapsulating layer  206  and the second side  204   b  of the second semiconductor chip  204 . The insulating layer  214  may, for example, insulate (e.g. electrically insulate) the interconnect structure  208  (e.g. the part  208   c ,  208   d ) of the chip arrangement  200 . The part  208   c ,  208   d  (e.g. RDL, for example frontside RDL) of the at least one electrical connector  212  may, for example, be partially or fully disposed within the indulating layer  214 . 
     The chip arrangement  200  may, for example, be used to package two or more chips (e.g. the first semiconductor chip  202  and the second semiconductor chip  204 ) that may, for example, be coupled (e.g. electrically coupled) to each other. For example, the chip arrangement  200  may be used to package a stack of two or more chips (e.g. the first semiconductor chip  202  and the second semiconductor chip  204 ) that may be integrated (e.g. vertically integrated) with each other. In other words, the chip arrangement  200  may, for example, be configured as a chip package. The chip arrangement  200  may, for example, be configured as an embedded wafer level ball grid array (eWLB) package. The chip arrangement  200  may, for example, be configured as a system-in-package (SiP). In other words, the chip arrangement  200  may be an SiP including a plurality of chips (or dies) (e.g. the first semiconductor chip  202  and the second semiconductor chip  204 ) enclosed in a single module that may, for example, perform functions of an electronic system. As compared to the conventional chip arrangements shown in  FIG. 1A  and  FIG. 1B , the chip arrangement  200  may include, or may be, a fan-out wafer level package. 
     An effect provided by the chip arrangement  200  may be that the second semiconductor chip  204  (e.g. daughter die) does not limit the number of electrical connectors  212  that may be provided for an electrical connection to or from the first semiconductor chip  202  (e.g. mother die). 
     An effect provided by the chip arrangement  200  may be that an area available for electrical routing on the first semiconductor chip  202  (e.g. mother die) is not limited by a presence of the second semiconductor chip  204  (e.g. daughter die). 
     An effect provided by the chip arrangement  200  may be that the at least one electrical connector  212  may be formed at a side (e.g. a backside) of the second semiconductor chip  204  (e.g. daughter die). This may be desirable, for example, when the second semiconductor chip  204  (e.g. daughter die) is not very small. 
     An effect provided by the chip arrangement  200  may be that electrical routing may be formed at a side (e.g. a backside) of the second semiconductor chip  204  (e.g. daughter die). This may be desirable, for example, when the second semiconductor chip  204  (e.g. daughter die) is not very small. 
     An effect provided by the chip arrangement  200  may be that the second semiconductor chip  204  (e.g. daughter die) may be thinned to a desired thickness after attaching it to the first semiconductor chip  202  (e.g. mother die). 
       FIG. 3  shows a cross-sectional view of a chip arrangement  300  including a filling material  302  disposed between the first semiconductor chip  202  and the second semiconductor chip  204 . 
     Reference signs in  FIG. 3  that are the same as in  FIG. 2  denote the same or similar elements as in  FIG. 2 . Thus, those elements will not be described in detail again here; reference is made to the description above. The various effects described above in relation to the chip arrangement  200  shown in  FIG. 2  may be analogously valid for the chip arrangement  300  shown in  FIG. 3 . Differences between  FIG. 3  and  FIG. 2  are described below. 
     The chip arrangement  300  may include a filling material  302  disposed between the first side  202   a  of the first semiconductor chip  202  and the first side  204   a  of the second semiconductor chip  204 . As shown in  FIG. 3 , the chip arrangement  300  may include at least one electrical connector  210  that may be disposed between the first side  202   a  of the first semiconductor chip  202  and the first side  204   a  of the second semiconductor chip  204 . The filling material  302  may, for example, partially enclose the at least one electrical connector  210  (e.g. bump and/or pillar). The filling material  302  may, for example, be formed by means of an underfilling process. For example, the underfilling process may include pre-applying the filling material  302  to the first semiconductor chip  202  and/or the second semiconductor chip  204 . For example, the underfilling process may include a capillary underfilling process where the filling material  302  may be formed between the first side  202   a  of the first semiconductor chip  202  and the first side  204   a  of the second semiconductor chip  204  by means of capillary action. 
       FIG. 4  shows a cross-sectional view of a chip arrangement  400  including a third semiconductor chip  402 . 
     Reference signs in  FIG. 4  that are the same as in  FIG. 2  denote the same or similar elements as in  FIG. 2 . Thus, those elements will not be described in detail again here; reference is made to the description above. The various effects described above in relation to the chip arrangement  200  shown in  FIG. 2  may be analogously valid for the chip arrangement  400  shown in  FIG. 4 . Differences between  FIG. 4  and  FIG. 2  are described below. 
     The chip arrangement  400  may include a third semiconductor chip  402 . The third semiconductor chip  402  may, for example, be a daughter die that may, for example, be coupled (e.g. electrically coupled) to the first semiconductor chip  202  (e.g mother die) and/or the second semiconductor chip  204  (e.g. daughter die). 
     The third semiconductor chip  402  may include a first side  402   a  and a second side  402   b  opposite the first side  402   a . The first side  402   a  and the second side  402   b  of the third semiconductor chip  402  may include, or may be, a frontside and a backside of the third semiconductor chip  402 , respectively. By way of another example, the first side  402   a  of the third semiconductor chip  402  may include, or may be, an active side of the third semiconductor chip  402 . By way of yet another example, the first side  402   a  and the second side  402   b  of the third semiconductor chip  402  may include, or may be, a bottom surface and a top surface of the third semiconductor chip  402 , respectively. 
     The third semiconductor chip  402  may, for example, be disposed at at least one of the second side  204   b  of the second semiconductor chip  204  and the second side  206   b  of the encapsulation layer  206 . For example, the third semiconductor chip  402  shown in  FIG. 4  may be disposed at a part of the second side  204   b  of the second semiconductor chip  204  and at a part of the second side  206   b  of the encapsulation layer  206 . 
     The second side  402   b  of the third semiconductor chip  402  may face in the same direction as the second side  204   b  of the second semiconductor chip  204  and the second side  206   b  of the encapsulation layer  206 . In other words, the first side  402   a  of the third semiconductor chip  402  may face the second side  204   b  of the second semiconductor chip  204  and/or the second side  206   b  of the encapsulation layer  206 . 
     The third semiconductor chip  402  may be coupled (e.g. electrically coupled) to the interconnect structure  208  via, for example, at least one electrical connector (e.g. interconnect, e.g. chip interconnect)  404  disposed between the first side  402   a  of the third semiconductor chip  402  and the interconnect structure  208 . For example, in the chip arrangement  400  shown in  FIG. 4 , the third semiconductor chip  402  may be coupled (e.g. electrically coupled) to the part  208   c ,  208   d  (e.g. RDL, for example frontside RDL) of the interconnect structure  208  that may extend over the second side  204   b  of the second semiconductor chip  204  via at least one electrical connector (e.g. interconnect, e.g. chip interconnect)  404 . 
     The at least one electrical connector  404  may be configured in a similar manner as the at least one electrical connector  210 . The at least one electrical connector  404  may include, or may be, at least one of a ball, a bump and a pillar. The at least one electrical connector  404  may include, or may consist of, at least one electrically conductive material selected from a group of electrically conductive materials, the group consisting of: a metal or metal alloy. For example, the at least one electrical connector  404  may consist of a solder material (e.g. an alloy of tin, silver, and copper). By way of another example, the at least one electrical connector  404  may consist of copper, palladium, titanium, tungsten, nickel, gold, aluminum or a conductive paste or a stack or an alloy including or consisting of one or more of the listed metals. 
     The third semiconductor chip  204  may be disposed at at least one of the second side  204   b  of the second semiconductor chip  204  and the second side  206   b  of the encapsulation layer  206  such that the at least one electrical connector  212  is disposed laterally adjacent to the third semiconductor chip  402 , as shown in  FIG. 4 . The at least one electrical connector  212  may extend a distance D1 from the second side  206   b  of the encapsulation layer  206 , and the second side  402   b  of the third semiconductor chip  402  may extend a distance D2 from the second side  206   b  of the encapsulation layer  206 . The distance D2 may be less than the distance D1. In other words, the at least one electrical connector  212  may protrude farther from the second side  206   b  of the encapsulation layer  206  than the distance D2 between the second side  402   b  of the third semiconductor chip  402  and the second side  206   b  of the encapsulation layer  206 . 
     An effect provided by the chip arrangement  400  may be that an additional semiconductor chip (e.g. the third semiconductor chip  402 , e.g. an additional daughter die) may be included in the chip arrangement  400 . 
       FIG. 5  shows a cross-sectional view of a chip arrangement  500  including at least one through-via  502  and a metallization layer  504 . 
     Reference signs in  FIG. 5  that are the same as in  FIG. 4  denote the same or similar elements as in  FIG. 4 . Thus, those elements will not be described in detail again here; reference is made to the description above. The various effects described above in relation to the chip arrangement  400  shown in  FIG. 4  may be analogously valid for the chip arrangement  500  shown in  FIG. 5 . Differences between  FIG. 5  and  FIG. 4  are described below. 
     The chip arrangement  500  may include at least one through-via  502  extending through the encapsulation layer  206  and/or at least one through-via  512  extending through the first semiconductor chip  202 . The at least one through-via  502  may, for example, extend from the second side  206   b  of the encapsulation layer  206  to the first side  206   a  of the encapsulation layer  206 . The at least one through-via  512  may, for example, extend from the first side  202   a  of the first semiconductor chip  202  to the second side  202   b  of the first semiconductor chip  202 . The at least one through-via  502  may, for example, be a through-mold via (TMV) (e.g. when the encapsulation layer  206  includes, or consists of, a molding material). The at least one through-via  512  may, for example, be a through-silicon via (TSV) (e.g. when the first semiconductor chip  202  includes silicon). The at least one through-via  502  and/or the at least one through-via  512  may, for example, include, or may consist of, at least one electrically conductive material, e.g. a metal and/or metal alloy. The at least one electrically conductive material may be selected from a group of electrically conductive materials, the group consisting of: aluminum, copper, and gold, although other electrically conductive materials may be possible as well. 
     The chip arrangement  500  may include a metallization layer  504 . The metallization layer  504  may, for example, include, or may consist of an electrically conductive material, e.g. a metal and/or metal alloy. The electrically conductive material may be selected from a group of electrically conductive materials, the group consisting of: aluminum, tungsten, titanium, copper, nickel, palladium and gold or a conductive paste (e.g. a polymer filled with electrically conductive particles), although other electrically conductive materials may be possible as well. 
     The metallization layer  504  may be disposed at least partially over the first side  206   a  of the encapsulation layer  206  and may be coupled (e.g. electrically coupled) to the at least one through-via  502 . For example, the metallization layer  504  shown in  FIG. 5  may be disposed over a part of the first side  206   a  of the encapsulation layer  206 . By way of another example, the metallization layer  504  may be formed over a part of the first side  206   a  of the encapsulation layer  206  and over a part of of the second side  202   b  of the first semiconductor chip  202 , as shown in  FIG. 5 . 
     The metallization layer  504  may, for example, be for coupling (e.g. electrically coupling) at least one additional chip package. In this regard, the chip arrangement  500  may further include at least one additional chip package  506 , which may be disposed over at least one of the first side  206   a  of the encapsulation layer  206  and the second side  202   b  of the first semiconductor chip  202 . In other words, the chip arrangement  500  may include, or may be, a package stack (namely, a stack of two or more chip packages). 
     The at least one additional chip package  506  may be coupled (e.g. electrically coupled) to the metallization layer  504 . For example, the at least one additional chip package  506  may be coupled (e.g. electrically coupled) to the metallization layer  504  via at least one electrical connector (e.g. interconnect, e.g. chip interconnect)  508  that may disposed between the at least one additional chip package  506  and at least one of the first side  206   a  of the encapsulation layer  206  and the second side  202   b  of the first semiconductor chip  202 . The at least one additional chip package  506  may be coupled (e.g. electrically coupled) to at least one of the first semiconductor chip  202  (e.g. to the first side  202   a  of the first semiconductor chip  202 ), the second semiconductor chip  204 , and the third semiconductor chip  402  by means of the at least one through-via  502  (e.g. at least one TMV) and/or the at least one through-via  512  (e.g. at least one TSV). 
     The at least one electrical connector  508  may be configured in a similar manner as the at least one electrical connector  212 . The at least one electrical connector (e.g. interconnect, e.g. chip interconnect)  508  may include, or may consist of, at least one electrically conductive material selected from a group of electrically conductive materials, the group consisting of: a metal or metal alloy. For example, the at least one electrical connector  508  may consist of a solder material (e.g. an alloy of tin, silver, and copper). By way of another example, the at least one electrical connector  508  may consist of copper, palladium, titanium, tungsten, nickel, gold, aluminum or a conductive paste or a stack or an alloy including or consisting of one or more of the listed metals. 
     The at least one electrical connector  508  may include, or may be, at least one of a ball, a bump and a pillar. The at least one electrical connector  508  may, for example, be an interface (e.g. a ball grid array of solder balls) for the at least one additional chip package  506 . 
       FIG. 6  shows a method  600  for manufacturing a chip arrangement. 
     The method  600  may, for example, be used to manufacture at least one of the chip arrangements shown in  FIG. 2  to  FIG. 5 . 
     The method  600  may include: providing a first semiconductor chip having a first side and a second side opposite the first side (in  602 ); disposing a second semiconductor chip over the first side of the first semiconductor chip, the second semiconductor chip having a first side and a second side opposite the first side, the first side of the second semiconductor chip facing the first side of the first semiconductor chip, wherein the second semiconductor chip may be electrically coupled to the first semiconductor chip (in  604 ); forming an encapsulation layer to at least partially encapsulate the first and second semiconductor chips, the encapsulation layer having a first side and a second side opposite the first side, the second side of the encapsulation layer facing in a same direction as the second side of the second semiconductor chip (in  606 ); and forming an interconnect structure at least partially within the encapsulation layer, wherein the interconnect structure may be electrically coupled to at least one of the first and second semiconductor chips and extends to the second side of the encapsulation layer (in  608 ). 
       FIG. 7A  to  FIG. 7I  show a process flow for a method for manufacturing a chip arrangement. 
     The method shown in  FIG. 7A  to  FIG. 7I  may, for example, be used to manufacture at least one of the chip arrangements shown in  FIG. 2  to  FIG. 5 . 
     The method shown in  FIG. 7A  to  FIG. 7I  may, for example, be used to couple (e.g. electrically couple) a daughter die to a mother die prior to packaging the mother die. 
     The method shown in  FIG. 7A  to  FIG. 7I  may allow a daughter die to be grinded to a desired thickness after attaching it to a mother die, after a reflow process that may couple (e.g. electrically couple) the daughter die to the mother die, and after an embedding process that may encapsulate the mother die and the daughter die. 
     As shown in  FIG. 7A  in a view  700 , the method for manufacturing a chip arrangement may include providing a first semiconductor chip  702  having a first side  702   a  and a second side  702   b  opposite the first side  702   a.    
     The first semiconductor chip  702  may further include at least one sidewall  702   c . The first side  702   a  and the second side  702   b  of the first semiconductor chip  702  may include, or may be, a frontside and a backside of the first semiconductor chip  702 , respectively. By way of another example, the first side  702   a  of the first semiconductor chip  702  may include, or may be, an active side of the first semiconductor chip  702 . The first semiconductor chip  702  may, for example, be a mother die (which may also be referred to as a carrier die). 
     As shown in  FIG. 7A , providing the first semiconductor chip  702  may include providing a wafer  702 -W, which may include a plurality of first semiconductor chips  702 . The wafer  702 -W may, for example, have a thickness T1. The thickness T1 may be a desired thickness of each of the plurality of first semiconductor chips  702 . As described above, the first semiconductor chip  702  may, for example, be a mother die (which may also be referred to as a carrier die). Accordingly, the wafer  702 -W may, for example, be a mother wafer (which may also be referred to as a carrier wafer). 
     Each of the plurality of first semiconductor chips  702  may include at least one respective electrically conductive contact  702   d  formed at a respective first side  702   a  of the respective first semiconductor chip  702 . The at least one respective electrically conductive contact  702   d  formed at a respective first side  702   a  of the respective first semiconductor chip  702  may include, or may be, a pad (e.g. a contact pad and/or a bonding pad). The at least one respective electrically conductive contact  702   d  may, for example, provide an interface (e.g. an electrical interface) for the respective first semiconductor chip  702 . In other words, signals (e.g. electrical signals, power supply potentials, ground potentials, etc.) may be exchanged with the respective first semiconductor chip  702  via the at least one respective electrically conductive contact  702   d.    
     As shown in  FIG. 7B  in a view  701 , the method for manufacturing a chip arrangement may include forming an interconnect structure  708 . 
     The interconnect structure  708  may include, or may consist of, at least one electrically conductive material selected from a group of electrically conductive materials, the group consisting of: a metal or a metal alloy, although other electrically conductive materials may be possible as well. For example, the interconnect structure  708  may include, or may consist of, copper, palladium, titanium, tungsten, nickel, gold, aluminum or a conductive paste or a stack or an alloy including or consisting of one or more of the listed metals. 
     The interconnect structure  708  may be formed by, for example, at least one of the following processes: sputtering, resist plating, electroplating, stripping, etching, electro-less plating, dispensing, and printing, although other processes may be possible as well. 
     The interconnect structure  708  may, for example, include a part  708   b  formed over the first side  702   a  of the first semiconductor chip  702 . The part  708   b  may, for example, include, or may be at least one pillar (e.g. metal pillar). Accordingly, forming the interconnect structure  708  may include forming at least one pillar (e.g. metal pillar) over the first side  702   a  of the first semiconductor chip  702 . The part  708   b  (e.g. at least one pillar) may be formed outside a receiving region R that may be configured to receive a daughter die. A height H of the part  708   b  (e.g. at least one pillar, e.g. metal pillar) may be greater than or equal to a thickness of the daughter die that may be received in the region R, and a height of at least one electrical connector that may be disposed between the daughter die and the first side  702   a  of the first semiconductor chip  702  (see description below for  FIG. 7C ). The height H of the part  708   c  (e.g. at least one pillar, e.g. metal pillar) may, for example, be required to be sufficiently high in order for it (namely, the part  708   c ) to be accessible after a grinding process (see description below in respect of  FIG. 7G ). 
     The part  708   b  (e.g. at least one pillar, for example metal pillar) of the interconnect structure  708  may be coupled (e.g. electrically coupled) to the at least one electrically conductive contact  702   d  of the first semiconductor chip  702 , for example, via a part  708   a  of the interconnect structure  708 . The part  708   a  of the interconnect structure  708  may include, or may be, a redistribution layer (RDL) disposed at the first side  702   a  of the first semiconductor chip  702 . The part  708   a  (e.g. RDL) of the interconnect structure  708  may be configured to redistribute and/or re-map electrical connections from the first side  702   a  of the first semiconductor chip  702 . Accordingly, forming the interconnect structure  708  may include forming the part  708   a  (e.g. RDL) over the first side  702   a  of the first semiconductor chip  702 , wherein the part  708   a  (e.g. RDL) may couple (e.g. electrically couple) the part  708   b  (e.g. at least one pillar, for example metal pillar) to the at least one electrically conductive contact  702   d  of the first semiconductor chip  702 . 
     As shown in  FIG. 7C  in a view  703 , the method for manufacturing a chip arrangement may include disposing a second semiconductor chip  704  over the first side  702   a  of the first semiconductor chip  702 . 
     The second semiconductor chip  704  may, for example, be a daughter die. The second semiconductor chip  704  may include a first side  704   a  and a second side  704   b  opposite the first side  704   a . The first side  704   a  and the second side  704   b  of the second semiconductor chip  704  may include, or may be, a frontside and a backside of the second semiconductor chip  704 , respectively. By way of another example, the first side  704   a  of the second semiconductor chip  704  may include, or may be, an active side of the second semiconductor chip  704 . 
     The second semiconductor chip  704  may be disposed at the receiving region R, and over the first side  702   a  of the first semiconductor chip  702 . The second semiconductor chip  704  may be disposed over the first side  702   a  of the first semiconductor chip  702  such that the first side  704   a  of the second semiconductor chip  704  may face the first side  702   a  of the first semiconductor chip  702 . 
     The second semiconductor chip  704  may, for example, be coupled (e.g. electrically coupled) to the first semiconductor chip  702  (e.g. mother die or carrier die). Accordingly, disposing the second semiconductor chip  704  over the first side  702   a  of the first semiconductor chip  702  may include attaching the first side  704   a  of the second semiconductor chip  704  to the first side  702   a  of the first semiconductor chip  702 , for example, via at least one electrical connector  710 . The at least one electrical connector  710  may be formed by means of at least one of a mass reflow bonding process, a thermo-compression bonding process, and gluing. 
     As described above in relation to  FIG. 7B , the height H of the part  708   b  (e.g. at least one pillar) may be greater than or equal to a thickness T2 of the second semiconductor chip  702  that may be received in the region R, and a height H2 of the at least one electrical connector  710  that may be disposed between the second semiconductor chip  702  and the first side  702   a  of the first semiconductor chip  702   
     The at least one electrical connector  710  may include, or may consist of, at least one electrically conductive material selected from a group of electrically conductive materials, the group consisting of: a metal or metal alloy. For example, the at least one electrical connector  710  may consist of a solder material (e.g. may contain tin, silver, nickel, conductive paste or copper or an alloy of one or more of the listed materials). By way of another example, the at least one electrical connector  710  may consist of copper, palladium, titanium, tungsten, nickel, gold, aluminum or a conductive paste or a stack or an alloy including or consisting of at least one of the listed metals. 
     The at least one electrical connector  710  may include, or may be, at least one of a ball, a bump and a pillar, although other electrical connectors may be possible as well. By way of an example, the at least one electrical connector  710  may include, or may be, a bump, for example, a solder bump and/or a micro-bump (e.g. micro solder bump) and/or a flip-chip bump. By way of another example, the at least one electrical connector  710  may include, or may be, a pillar bump (e.g. a metal-pillar bump, for example a copper-pillar bump). 
     The method for manufacturing a chip arrangement may include forming a filling layer disposed between the first side  702   a  of the first semiconductor chip  702  and the first side  704   a  of the second semiconductor chip  704  (not shown in  FIG. 7C ). The filling layer may include, or may consist of, a filling material which may, for example, partially enclose the at least one electrical connector  710  (e.g. bump and/or pillar). The filling layer may, for example, be formed by means of an underfilling process. For example, the underfilling process may include pre-applying filling material to the first semiconductor chip  702  and/or the second semiconductor chip  704 . For example, the underfilling process may include a capillary underfilling process where the filling layer may be formed between the first side  702   a  of the first semiconductor chip  702  and the first side  704   a  of the second semiconductor chip  704  by means of capillary action. 
     As shown in  FIG. 7D  in a view  705 , the method for manufacturing a chip arrangement may include separating the plurality of first semiconductor chips  702 . For example, the wafer  702 -W (e.g. mother wafer) may be diced (e.g. by means of laser dicing and/or sawing) to separate the plurality of first semiconductor chips  702 . Hereafter, the diced stacks, which may include the first semiconductor chip  702  and the second semiconductor chip  704  may be reconstituted in a similar or the same manner as in a standard eWLB process, as described in the following. 
     The method for manufacturing a chip arrangement may include forming an encapsulation layer  706  to at least partially encapsulate the first and second semiconductor chips  702 ,  704 . This is shown in  FIG. 7E  to  FIG. 7G . 
     As shown in  FIG. 7E  in a view  707 , forming the encapsulation layer  706  to at least partially encapsulate the first and second semiconductor chips  702 ,  704  may include placing the first semiconductor chip  702  and the second semiconductor chip  704  on an adhesive tape  720  (e.g. a removable double-sided adhesive tape), which may be disposed on a carrier  722 . The second surface  702   b  of the first semiconductor chip  702  may, for example, be in contact with the adhesive tape  720 . In other words, the part  708   b  of the interconnect structure  708  and the second surface  704   b  of the second semiconductor chip  704  may face away from the carrier  722 , as shown in  FIG. 7E . In another example, however, the part  708   b  of the interconnect structure  708  and the second surface  704   b  of the second semiconductor chip  704  may face the carrier  722 . 
     As shown in  FIG. 7F  in a view  709 , forming the encapsulation layer  706  to at least partially encapsulate the first and second semiconductor chips  702 ,  704  may include embedding the first semiconductor chip  702  and the second semiconductor chip  704  in an encapsulation layer  706 . For example, the encapsulation layer  706  may cover the second side  704   b  of the second semiconductor chip  704  and the part  708   b  (e.g. at least one metal pillar) of the interconnect structure  708 . 
     The encapsulation layer  706  may be formed by means of at least one of a molding process (e.g. compression mold flow process), a lamination process, and a pressing process. In other words, the first and second semiconductor chips  702 ,  704  may be at least partially embedded in the encapsulation layer  706  by means of molding (e.g. compression mold flow) and/or laminating. 
     The encapsulation layer  706  may have a first side  706   a  and a second side  706   b  opposite the first side  706   a . The second side  706   b  of the encapsulation layer  706  may, for example, face in a same direction as the second side  704   b  of the second semiconductor chip  704 . The first side  706   a  of the encapsulation layer  706  may, for example, be a backside of a chip arrangement manufactured according to the method shown in  FIG. 7A  to  FIG. 7I . The second side  706   b  of the encapsulation layer  706  may, for example, be a frontside of a chip arrangement manufactured according to the method shown in  FIG. 7A  to  FIG. 7I . 
     The adhesive tape  720  may be subsequently cured, and the carrier  722  and the adhesive tape  720  may, for example, be released from the first semiconductor chip  702  and the encapsulation layer  706 . 
     A thickness E of the encapsulation layer  706  formed over the second surface  704   b  of the second semiconductor chip  704  may, for example, depend on a filler size of the encapsulation layer  706  (e.g. including or consisting of a mold compound), and may, for example, be in the range from about 50 μm to about 150 μm, for example in the range from about 70 μm to about 140 μm, for example in the range from about 90 μm to about 130 μm, for example about 120 μm, although other thicknesses may be possible as well. For example, the thickness E may be about 1.5 to 2 times the filler size of the encapsulation layer  706  (e.g. including or consisting of a mold compound). For example, in case the filler size (e.g. maximum filler size) of the encapsulation layer  706  (e.g. including or consisting of a mold compound) is about 70 μm, the thickness E of the encapsulation layer  706  formed over the second surface  704   b  of the second semiconductor chip  704  may be in the range from about 100 μm to about 140 μm, for example about 120 μm. The encapsulation layer  706  (e.g. mold compound) may be at least flush with the second surface  704   b  (e.g. backside) of the second semiconductor chip  704 . Accordingly, a part of the encapsulation layer  706  formed over the second surface  704   b  of the second semiconductor chip  704  may be removed. 
     As shown in  FIG. 7G  in a view  711 , forming the encapsulation layer  706  to at least partially encapsulate the first and second semiconductor chips  702 ,  704  may include removing a part of the encapsulation layer  706  to expose the part  708   b  (e.g. at least one metal pillar) of the interconnect structure  708 . 
     Removing a part of the encapsulation layer  706  to expose the part  708   b  (e.g. at least one metal pillar) of the interconnect structure  708  may be performed by means of, for example, a grinding process (indicated in  FIG. 7G  as arrow  724 ). 
     The grinding process may, for example, be additionally used to thin the second semiconductor chip  704  after forming the encapsulation layer  706 . In other words, the second semiconductor chip  704  that may be embedded in the encapsulation layer  706  may be thinned together with the encapsulation layer  706  by means of the grinding process. For example, the grinding process may additionally grind the second surface  704   b  of the second semiconductor chip  704 . The semiconductor chip  704  may be thinned to any desired thickness, for example a thickness of less than or equal to about 100 μm, for example less than or equal to about 75 μm, for example less than or equal to about 50 μm, for example less than or equal to about 20 μm, for example less than or equal to about 15 μm, although other thicknesses may be possible as well. 
     Accordingly, as shown in  FIG. 7G , the second semiconductor chip  704  (e.g. daughter die) may be grinded to a desired thickness after attaching it to the first semiconductor chip  702  (e.g. mother die), after a reflow process that may couple (e.g. electrically couple) the second semiconductor chip  704  (e.g. daughter die) die to the first semiconductor chip  702  (e.g. mother die) (e.g. via the at least one electrical connector  710 ), and after an embedding process that may encapsulate the first semiconductor chip  702  (e.g. mother die) and the second semiconductor chip  704  (e.g. daughter die). 
     The grinding process  724  may, for example, leave a residue on the second side  704   b  of the second semiconductor chip  704  (e.g. daughter die). The residue may, for example, include material of the second semiconductor chip  704  (e.g. daughter die) and/or material of the encapsulation layer  706  and/or material (e.g. copper) of the part  708   c  (e.g. at least one pillar, e.g. metal pillar) of the interconnect structure  708 . This residue may be removed by means of an etching process (e.g. dry and/or wet etch process) and/or a cleaning process (e.g. a dissolution process). 
     As shown in  FIG. 7H  in a view  713 , the method for manufacturing a chip arrangement may include forming a redistribution layer (RDL)  708   c  over at least one of the second side  706   b  of the encapsulation layer  706  and the second side  704   b  of the second semiconductor chip  704 . The RDL  708   c  may form a part of the interconnect structure  708 . The RDL  708   c  may, for example, be formed by means of thin-film technology (e.g. a sputtering process and/or a plating process) and/or PCB (printed circuit board) technology (e.g. electroless plating process and/or electroplating process), or by means of other methods (e.g. printing, seeding and structuring (e.g. by laser) for electroless plating). The method for manufacturing a chip arrangement may include forming a dielectric layer  726 , for example, prior to forming the RDL  708   c . The dielectric layer  726  may, for example, be structured by means of etching (e.g. laser etching) and/or lithography (e.g. photolithography). 
     As shown in  FIG. 7H , there may be a region S at the second surface  706   b  of the encapsulation layer  706  that may be used for electrical routing (e.g. by means of the RDL  708   c ). Accordingly, an area available for electrical routing on the first semiconductor chip  702  (e.g. mother die) may not be limited by a presence of the second semiconductor chip  704  (e.g. daughter die). Furthermore, electrical routing (e.g. by means of the RDL  708   c ) may be formed at a side  704   b  (e.g. a backside) of the second semiconductor chip  704  (e.g. daughter die). This may be desirable, for example, when the second semiconductor chip  704  (e.g. daughter die) is not very small (e.g. has a wide lateral extent). 
     As shown in  FIG. 7I  in a view  715 , the method for manufacturing a chip arrangement may include forming at least one electrical connector  712  (e.g. solder ball) over at least one of the second side  706   b  of the encapsulation layer  706  and the second side  704   b  of the second semiconductor chip  704 . The at least one electrical connector  712  (e.g. solder ball) may be formed, for example, after forming a stop layer  728  (e.g. a solder stop layer) over the dielectric layer  726 . The at least one electrical connector  712  may be coupled (e.g. electrically coupled) to the interconnect structure  708 . For example, the at least one electrical connector  712  may be coupled (e.g. electrically coupled) to the RDL  708   c  of the interconnect structure  708 . 
     As shown in  FIG. 7I , the second semiconductor chip  704  (e.g. daughter die) may not limit the number of electrical connectors  712  that may be provided on the chip arrangement manufactured according to the method presented in  FIG. 7A  to  FIG. 7I . Furthermore, the at least one electrical connector  712  may be formed at a side (e.g. a backside  704 B) of the second semiconductor chip  704  (e.g. daughter die). This may be desirable, for example, when the second semiconductor chip  704  (e.g. daughter die) is not very small. 
     The chip arrangement manufactured according to the method presented in  FIG. 7A  to  FIG. 7I  may be thicker compared to the chip arrangement  100  (shown in  FIG. 1A ) and/or the chip arrangement  101  (shown in  FIG. 1B ). However, according to the method presented in  FIG. 7A  to  FIG. 7I , the second semiconductor chip  704  (e.g. daughter die) may be thinned to smaller thicknesses (e.g. less than or equal to about 100 μm, for example less than or equal to about 75 μm, for example less than or equal to about 50 μm, for example less than or equal to about 20 μm, for example less than or equal to about 15 μm) compared to the chip arrangements  100  and  101 . This may be a result of the second semiconductor chip  704  (e.g. daughter die) being embedded in the encapsulation layer  706  (e.g. mold compound) and being thinned together with the encapsulation layer  706  (e.g. mold compound), as shown in  FIG. 7G . This may be in contrast to the chip arrangements  100  and  101  where the daughter die may have to be thinned prior to assembly to the mother die. 
     According to various examples described herein, a chip arrangement may be provided. The chip arrangement may include: a first semiconductor chip having a first side and a second side opposite the first side; a second semiconductor chip having a first side and a second side opposite the first side, the second semiconductor chip disposed at the first side of the first semiconductor chip and electrically coupled to the first semiconductor chip, the first side of the second semiconductor chip facing the first side of the first semiconductor chip; an encapsulation layer at least partially encapsulating the first semiconductor chip and the second semiconductor chip, the encapsulation layer having a first side and a second side opposite the first side, the second side facing in a same direction as the second side of the second semiconductor chip; and an interconnect structure disposed at least partially within the encapsulation layer and electrically coupled to at least one of the first and second semiconductor chips, wherein the interconnect structure extends to the second side of the encapsulation layer. 
     The chip arrangement may further include at least one electrical connector disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip, the at least one electrical connector electrically coupling the first semiconductor chip to the second semiconductor chip. 
     The first side of the first semiconductor chip may be a front side of the first semiconductor chip and the second side of the first semiconductor chip may be a back side of the first semiconductor chip. 
     The first side of the first semiconductor chip may be an active side of the first semiconductor chip. 
     The first side of the second semiconductor chip may be a front side of the second semiconductor chip and the second side of the second semiconductor chip may be a back side of the second semiconductor chip. 
     The first side of the second semiconductor chip may be an active side of the second semiconductor chip. 
     The interconnect structure may extend from the first side of the first semiconductor chip to the second side of the encapsulation layer. 
     The interconnect structure may extend from between the first side of the first semiconductor chip and the first side of the second semiconductor chip to the second side of the encapsulation layer. 
     The interconnect structure may further extend over the second side of the second semiconductor chip. 
     The second side of the encapsulation layer may be substantially flush with the second side of the second semiconductor chip. 
     The first side of the encapsulation layer may be substantially flush with the second side of the first semiconductor chip. 
     The chip arrangement may further include: at least one electrical connector disposed at the second side of the encapsulation layer and electrically coupled to the interconnect structure. 
     The at least one electrical connector disposed at the second side of the encapsulation layer may include a solder ball. 
     The interconnect structure may be electrically coupled to the first semiconductor chip and the second semiconductor chip. 
     The interconnect structure may be electrically coupled to the at least one electrical connector disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip. 
     The interconnect structure may include at least one metal pillar extending from the first side of the first semiconductor chip layer to the second side of the encapsulation layer. 
     The at least one metal pillar may be disposed laterally adjacent to the second semiconductor chip. 
     The interconnect structure may further include a redistribution layer disposed at the first side of the first semiconductor chip and electrically coupled to the at least one metal pillar. 
     The chip arrangement may further include: at least one electrical connector disposed at the second side of the second semiconductor chip and electrically coupled to the interconnect structure. 
     The at least one electrical connector disposed at the second side of the semiconductor chip may include, or may be, a solder ball. 
     The interconnect structure may further extend over the second side of the second semiconductor chip, and the chip arrangement may further include: at least one electrical connector disposed at the second side of the encapsulation layer and electrically coupled to the interconnect structure, and at least one electrical connector disposed at the second side of the second semiconductor chip and electrically coupled to the interconnect structure. 
     The at least one electrical connector disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip may include, or may be, at least one of the following: a bump; a metal pillar. 
     The encapsulation layer may include a material different from the first semiconductor chip and the second semiconductor chip. 
     The encapsulation layer may include an insulating material. 
     The encapsulation layer may include a plastic material. 
     The encapsulation layer may include a molding material. 
     The encapsulation layer may include a laminate material. 
     The first semiconductor chip may include at least one electrically conductive contact disposed at the first side of the first semiconductor chip and electrically coupled to the at least one electrical connector disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip. 
     The at least one electrically conductive contact of the first semiconductor chip may include a pad. 
     The second semiconductor chip may include at least one electrically conductive contact disposed at the first side of the second semiconductor chip and electrically coupled to the at least one electrical connector disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip. 
     The at least one electrically conductive contact of the second semiconductor chip may include a pad. 
     The first semiconductor chip may be larger than the second semiconductor chip. 
     The first semiconductor chip may have a larger chip area than the second semiconductor chip. 
     The first semiconductor chip may have a greater length than the second semiconductor chip. 
     The first semiconductor chip may extend laterally beyond the second semiconductor chip. 
     The second semiconductor chip may be disposed laterally within a boundary of the first semiconductor chip. 
     The second semiconductor chip may have a thickness of less than or equal to about 100 μm. 
     The second semiconductor chip may have a thickness of less than or equal to about 50 μm. 
     The chip arrangement may further include: a third semiconductor chip disposed at at least one of the second side of the second semiconductor chip and the second side of the encapsulation layer, the third semiconductor chip having a first side and a second side opposite the first side, the second side of the third semiconductor chip facing in the same direction as the second side of the second semiconductor chip and the second side of the encapsulation layer. 
     The first side of the third semiconductor chip may be a front side of the third semiconductor chip and the second side of the third semiconductor chip may be a back side of the third semiconductor chip. 
     The first side of the third semiconductor chip may be an active side of the third semiconductor chip. 
     The third semiconductor chip may be electrically coupled to the interconnect structure. 
     The chip arrangement may further include: at least one electrical connector disposed over the second side of the encapsulation layer laterally adjacent to the third semiconductor chip and electrically coupled to the interconnect structure, wherein the at least one electrical connector protrudes farther from the second side of the encapsulation layer than the third semiconductor chip. 
     The chip arrangement may further include: at least one electrical connector disposed over the second side of the encapsulation layer laterally adjacent to the third semiconductor chip and electrically coupled to the interconnect structure, wherein the at least one electrical connector protrudes farther from the second side of the encapsulation layer than a distance between the second side of the third semiconductor chip and the second side of the encapsulation layer. 
     The chip arrangement may further include a filling material disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip. 
     The chip arrangement may further include a filling material disposed between the first side of the first semiconductor chip and the first side of the second semiconductor chip and at least partially enclosing the at least one electrical connector. 
     The chip arrangement may be configured as a chip package. 
     The chip arrangement may be configured as an embedded wafer level ball grid array package. 
     The chip arrangement may further include: at least one through-via extending through the encapsulation layer, and a metallization layer disposed at least partially over the first side of the encapsulation layer and electrically coupled to the at least one through-via, for electrically coupling at least one additional chip package. 
     The at least one through-via may extend from the second side of the encapsulation layer to the first side of the encapsulation layer. 
     The chip arrangement may further include at least one additional chip package disposed over at least one of the first side of the encapsulation layer and the second side of the first semiconductor chip, and electrically coupled to the metallization layer. 
     According to various examples described herein, a method for manufacturing a chip arrangement may be provided. The method may include: providing a first semiconductor chip having a first side and a second side opposite the first side; disposing a second semiconductor chip over the first side of the first semiconductor chip, the second semiconductor chip having a first side and a second side opposite the first side, the first side of the second semiconductor chip facing the first side of the first semiconductor chip, wherein the second semiconductor chip is electrically coupled to the first semiconductor chip; forming an encapsulation layer to at least partially encapsulate the first and second semiconductor chips, the encapsulation layer having a first side and a second side opposite the first side, the second side of the encapsulation layer facing in a same direction as the second side of the second semiconductor chip; and forming an interconnect structure at least partially within the encapsulation layer, wherein the interconnect structure is electrically coupled to at least one of the first and second semiconductor chips and extends to the second side of the encapsulation layer. 
     Forming the encapsulation layer may include at least one of the following: a molding process; a lamination process. 
     Providing the first semiconductor chip may include providing a wafer including a plurality of first semiconductor chips, each of the plurality of first semiconductor chips having at least one electrically conductive contact at a respective first side of the respective first semiconductor chip. 
     The first semiconductor chip may have at least one electrically conductive contact at a first side of the first semiconductor chip, wherein forming the interconnect structure at least partially within the encapsulation layer may include: forming at least one metal pillar over the first side of the first semiconductor chip electrically coupled to the at least one electrically conductive contact of the first semiconductor chip, before disposing the second semiconductor chip over the first side of the first semiconductor chip; forming the encapsulation layer after disposing the second semiconductor chip over the first side of the first semiconductor chip to at least partially encapsulate the first and second semiconductor chips and the at least one metal pillar. 
     Disposing the second semiconductor chip over the first side of the first semiconductor chip may include attaching the first side of the second semiconductor to the first side of the first semiconductor chip. 
     Attaching the first side of the second semiconductor to the first side of the first semiconductor chip may include at least one of the following: mass reflow bonding; thermo-compression bonding; gluing. 
     Forming the interconnect structure at least partially within the encapsulation layer further may include: forming a redistribution layer over the first side of the first semiconductor chip electrically coupling the at least one metal pillar to the at least one electrically conductive contact of the first semiconductor chip, before disposing the second semiconductor chip over the first side of the first semiconductor chip. 
     The method may further include: thinning the second semiconductor chip after forming the encapsulation layer. 
     Thinning the second semiconductor chip may include grinding the second semiconductor chip and the encapsulation layer after forming the encapsulation layer. 
     Forming the encapsulation layer to at least partially encapsulate the first and second semiconductor chips and the at least one metal pillar may include: forming the encapsulation layer to cover the second side of the second semiconductor chip and the at least one metal pillar; removing a part of the encapsulation layer to expose the at least one metal pillar. 
     The method may further include: forming at least one electrical connector over at least one of the second side of the encapsulation layer and the second side of the second semiconductor chip after forming the encapsulation layer, wherein the at least one electrical connector is electrically coupled to the interconnect structure. 
     Forming the interconnect structure may further include: forming a redistribution layer over at least one of the second side of the encapsulation layer and the second side of the second semiconductor chip after forming the encapsulation layer to electrically couple the at least one electrical connector to the interconnect structure. 
     According to various examples described herein, an embedded wafer level ball grid array (eWLB) package may be provided. The eWLB package may include: a first semiconductor chip having a front side and a back side; a second semiconductor chip having a front side and a back side, the second semiconductor chip disposed at the front side of the first semiconductor chip, the front side of the second semiconductor chip facing the front side of the first semiconductor chip; at least one electrical connector disposed between the front side of the first semiconductor chip and the front side of the second semiconductor chip and electrically coupling the first semiconductor chip to the second semiconductor chip; an encapsulation layer at least partially encapsulating the first semiconductor chip, the second semiconductor chip and the at least one electrical connector, the encapsulation layer having a first side and a second side opposite the first side, the second side of the encapsulation layer facing in a same direction as the second side of the second semiconductor chip; an interconnect structure disposed at least partially within the encapsulation layer and electrically coupled to at least one of the first and second semiconductor chips, wherein the at least one interconnect structure extends from the first side of the first semiconductor chip to the second side of the encapsulation layer. 
     Various examples and aspects described in the context of one of the chip arrangements or chip packages or methods described herein may be analogously valid for the other chip arrangements or chip packages or methods described herein. 
     While various aspects have been particularly shown and described with reference to these aspects of this disclosure, it should be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims. The scope of the disclosure is thus indicated by the appended claims and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced.