PATENT DOCUMENT

Publication Number: US-9841787-B2
Application Number: US-201514825143-A
Country: US
Kind Code: B2

Title: Retention features of a portable computer

Abstract:
A portable computing device is disclosed. The portable computing device includes a retention member that provides a force to a flexible circuit disposed in a top portion and a bottom portion of the portable computing device. The retention member limits movement of the flexible circuit when, for example, the flexible circuit receives a force in response to the top portion pivoting with respect to the bottom portion. The bottom portion of the portable computing devices includes a bottom case having multiple terraced regions. The terraced regions allow the bottom portion to receive additional internal components, such as one or more battery packs, a main logic board, and/or one or more speaker modules. The battery packs are secured to the terraced region via adhesive rings. Although the terraced regions require additional material removed from the bottom case, the internal components secured to the bottom case provide structural support.

Claims:
What is claimed is: 
     
       1. A retention feature for securing a flexible circuit assembly in an enclosure of a portable computing device, wherein the enclosure has upper and lower interior surfaces and first and second undercut regions in the upper interior surface, the retention feature comprising:
 a first extension that protrudes into the first undercut region of the enclosure; 
 a second extension that protrudes into the second undercut region of the enclosure; 
 a central portion between the first and second extensions that secures the flexible circuit assembly to the upper and lower surfaces of the enclosure; and 
 wherein the first extension and the second extension combine with the central portion to provide a counteracting force exerted on the flexible circuit assembly when the enclosure pivots with respect to a base portion of the portable computing device. 
 
     
     
       2. The retention feature of  claim 1 , further comprising:
 a first mounting structure that receives a first fastener to secure the first extension with the enclosure; and 
 a second mounting structure that receives a second fastener to secure the second extension with the enclosure. 
 
     
     
       3. The retention feature of  claim 2 , further comprising a compressible member that applies a force to the flexible circuit assembly such that the flexible circuit assembly engages the enclosure. 
     
     
       4. The retention feature of  claim 3 , further comprising a polycarbonate material including glass fiber. 
     
     
       5. The retention feature of  claim 3 , wherein the compressible member comprises a foam material. 
     
     
       6. The retention feature of  claim 1 , wherein the first extension and the second extension are elevated with respect to the central portion to define a bowed configuration, wherein the bowed configuration provides a preload force. 
     
     
       7. A portable computing device, comprising:
 a display housing that comprises a display module and a magnet that generates a first magnetic field; 
 a base portion coupled with the display housing; 
 a sensor disposed in the base portion, the sensor configured to detect the first magnetic field of the magnet and generate an electrical signal in response to detecting the first magnetic field; and 
 a magnetic shield feature that covers the sensor, the magnetic shield feature configured to redirect a second magnetic field away from the sensor to prevent the sensor from generating the electrical signal, the second magnetic field generated by an external magnet. 
 
     
     
       8. The portable computing device of  claim 7 , further comprising a second magnetic shield feature aligned with the magnetic shield feature to further redirect the second magnetic field away from the sensor. 
     
     
       9. The portable computing device of  claim 8 , wherein the base portion comprises a keyboard assembly that includes a keyboard shield having an electrically conductive layer, wherein the magnetic shield feature is electrically coupled with the electrically conductive layer. 
     
     
       10. The portable computing device of  claim 9 , wherein the base portion further comprises a bottom case, and wherein the second magnetic shield feature is electrically coupled with the bottom case. 
     
     
       11. The portable computing device of  claim 10 , wherein the magnetic shield feature and the second magnetic shield feature are separated by an air gap. 
     
     
       12. The portable computing device of  claim 10 , wherein the bottom case comprises a terraced region that receives an internal component. 
     
     
       13. The portable computing device of  claim 12 , wherein the bottom case further comprises a foot feature that includes a first mechanical interlock in a first cavity of the bottom case and a second mechanical interlock in a second cavity of the bottom case. 
     
     
       14. The portable computing device of  claim 7 , wherein the display housing comprises a retention feature that includes a first extension that and a second extension that engaged the display housing, wherein the retention feature engages a flexible circuit assembly extending from the display housing to the base portion to limit movement of the flexible circuit assembly. 
     
     
       15. An electronic device comprising:
 a housing member with first and second retention structures, wherein the first retention structure has a first angled cavity and the second retention structure has a second angled cavity; 
 an electrical component mounted in the housing member, the electrical component having first and second openings respectively aligned with the first and second angled cavities; 
 a first fastener that passes through the first opening and the first angled cavity; and 
 a second fastener that passes through the second opening and the second angled cavity. 
 
     
     
       16. The electronic device of  claim 15  wherein the first and second angled cavities are angled toward each other. 
     
     
       17. The electronic device of  claim 15  wherein the electrical component comprises an input device. 
     
     
       18. The electronic device of  claim 17  wherein the input device comprises a keyboard. 
     
     
       19. The electronic device of  claim 18  further comprising an adhesive that secures the keyboard to the housing member. 
     
     
       20. The electronic device of  claim 18  wherein the keyboard comprises a plurality of keys that align with a plurality of holes in the housing member.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of priority under 35 U.S.C §119(e) to i) U.S. Provisional Application No. 62/106,687, filed on Jan. 22, 2015, and titled “Enclosure Features of a Portable Computer”; ii) U.S. Provisional Application No. 62/106,689, filed on Jan. 22, 2015, and titled “Keyboard Structure and Retention Features of a Portable Computer”; iii) U.S. Provisional Application No. 62/111,036, filed on Feb. 2, 2015, and titled “Enclosure Features of a Portable Computer,”; and iv) U.S. Provisional Application No. 62/111,042, filed on Feb. 2, 2015, and titled “Keyboard Structure and Retention Features of a Portable Computer”, the disclosure of each is incorporated herein by reference in its entirety. 
    
    
     FIELD 
     The described embodiments relate generally to portable electronic devices. In particular, the present embodiments relate to features used to assemble a portable electronic device and its various features. 
     BACKGROUND 
     Portable electronic devices are known to include an enclosure that receives internal components. For instance, the enclosure may include a bottom portion that stores several internal components, such as a battery and a processor circuit. The enclosure may further include a top portion coupled with the bottom portion. The top portion may include components such as a visual display and a camera. Typically, the top portion is designed to pivot with respect to the bottom portion in order to present the portable computing device in an open configuration or a closed configuration. In order to provide electrical current to the visual display and the camera, a flexible circuit may be electrically coupled with the battery as well as the processor circuit, and may also extend from the bottom portion to the top portion. 
     However, this presents several challenges. For instance, the flexible circuit may be coupled with an electrical connector designed to mate with an integrated circuit within the display housing. Each time the top portion is actuated to pivot about the bottom portion, a force is applied to the flexible circuit which may cause the flexible circuit to decouple with the electrical connector. As a result, there is a loss of power and/or data communication between components in the bottom portion and components in the top portion. Also, the flexible circuit may become visible to an end user of the portable computing device which is generally undesirable. 
     Also, current trends in portable computing devices include a portable computing device having a smaller footprint. As a result, the device may include a reduced internal space or volume. This presents several challenges. For instance, the bottom portion of the portable computing device may include a sensor designed to provide an input signal to the portable computing device when the device in or near a closed configuration—when the top portion is sufficiently close to the bottom portion—in order to power down the visual display. One method of doing so includes a Hall Effect sensor capable of detecting a magnetic field produced from a magnet in the top portion. However, other devices including magnets can be detected by the Hall Effect sensor which may induce a “false trigger” which powers down the visual display when the portable electronic device is in an open configuration. 
     In addition, the bottom portion may include a bottom case that defines a base region of the portable computing device. In addition to the bottom case having a given thickness, the bottom case may further include a curved, or non-linear contour such that when combined with a top case (also part of the bottom portion), a reduced internal volume results. The reduced internal volume may lead to smaller internal components, such as a smaller battery pack. As a result, the portable computing device may operate under a reduced operating time between charging consecutive charges of the battery pack. 
     SUMMARY 
     In one aspect, a retention feature for securing a flexible circuit assembly in an enclosure of a portable computing device is described. The retention feature may include a first region including a first extension configured to engage a first undercut region of the enclosure. The retention feature may further include a second region including a second extension configured to engage a second undercut region of the enclosure. The retention feature may further include a central region between the first region and the second region and configured to engage the flexible circuit assembly. In some embodiments, the first extension and the second extension combine with the central region to provide a counteracting force exerted on the flexible circuit assembly when the enclosure pivots with respect to a base portion of the portable computing device. 
     In another aspect, a portable computing device is described. The portable computing device may include a display housing that includes a display module and a magnet that generates a first magnetic field. The portable computing device may further include a base portion coupled with the display housing. The portable computing device may further include a sensor disposed in the base portion, the sensor configured to detect the first magnetic field of the magnet and generate an electrical signal in response to detecting the first magnetic field. The portable computing device may further include a magnetic shield feature that covers the sensor. The magnetic shield feature may be configured to redirect a second magnetic field away from the sensor to prevent the sensor from generating the electrical signal. Also, the second magnetic field may be generated by an external magnet. 
     In another aspect, a method for assembling a portable computing device is described. The method may include extending a first protrusion of a foot feature through a first opening of an enclosure. The method may further include extending a second protrusion of the foot feature through a second opening of the enclosure. The method may further include receiving heat at the first protrusion and the second protrusion to melt the first protrusion in a first cavity of the enclosure and to melt the second protrusion in a second cavity of the enclosure. Also, the second cavity may be different from the first cavity. 
     Other systems, methods, features and advantages of the embodiments will be, or will become, apparent to one of ordinary skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the embodiments, and be protected by the following claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will be readily understood by the following detailed description in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements, and in which: 
         FIG. 1  illustrates an isometric view of an embodiment of a portable computing device in an open configuration; 
         FIG. 2  illustrates an isometric view of the embodiment of the portable computing device shown in  FIG. 1  in a closed configuration; 
         FIG. 3  illustrates a bottom view of an interior region of a top case, in accordance with the described embodiments; 
         FIG. 4  illustrates an enlarged view of a partial cross section of the top case shown in  FIG. 3 , showing several end cavities under the first side rail; 
         FIG. 5  illustrates a cross sectional view of the first side rail and the second side rail of the top case shown in  FIG. 3 ; 
         FIG. 6  illustrates an isometric view of an embodiment of a keyboard assembly, in accordance with the described embodiments; 
         FIG. 7  illustrates an isometric view of the keyboard assembly shown in  FIG. 6 , with the keyboard assembly secured with a material handling feature; 
         FIG. 8  illustrates a plan view of the keyboard assembly secured with the material handling feature shown in  FIG. 7 , prior to inserting the keyboard assembly into the top case; 
         FIG. 9  illustrates a plan view of the material handling feature carrying the keyboard assembly over the top case, in accordance with the described embodiments; 
         FIG. 10  illustrates a side view of the material handling feature, the keyboard assembly, and the top case shown in  FIG. 9 ; 
         FIG. 11  illustrates a plan view of the material handling feature partially inserting the keyboard assembly into the top case, in accordance with the described embodiments; 
         FIG. 12  illustrates a side view of the material handling feature, the keyboard assembly, and the top case shown in  FIG. 11 ; 
         FIG. 13  illustrates a plan view of the material handling feature fully inserting the keyboard assembly into the top case, in accordance with the described embodiments; 
         FIG. 14  illustrates a side view of the material handling feature, the keyboard assembly, and the top case shown in  FIG. 13 ; 
         FIG. 15  illustrates an isometric view of an embodiment of an assembly mechanism; 
         FIG. 16  illustrates an isometric view of an embodiment of an alternate assembly mechanism; 
         FIG. 17  illustrates a plan view of the alignment tool positioned on the keyboard assembly of the portable computing device; 
         FIG. 18  illustrates a cross sectional view taken along line  18 - 18  in  FIG. 17 , showing the first fastener receiver aligning the first fastener with the second end opening of the circuit board and the second end cavity of the top case; 
         FIG. 19  illustrates a plan view of the alignment tool subsequent to the installation of the fasteners, with the main body removed; 
         FIG. 20  illustrates a cross sectional view taken along line  20 - 20  in  FIG. 19 , showing the first fastener receiver installed; 
         FIG. 21  illustrates a cross sectional view of an alternate embodiment of a portable computing device that includes a retractable fastener as a securing means for a circuit board to a top case; 
         FIG. 22  illustrates a cross sectional view of the portable computing device shown in  FIG. 21 , with the retractable fastener securing the circuit board to the top case; 
         FIG. 23  illustrates an exploded view of several layers defining a keyboard shield used with the keyboard assembly, in accordance with the described embodiments; 
         FIG. 24  illustrates an isometric view of the keyboard shield secured with the keyboard assembly; 
         FIG. 25  illustrates a cross sectional view of a sensor in the portable computing device; 
         FIG. 26  illustrates a plan view of a first magnetic shield feature secured with the circuit board and covering the sensor; 
         FIG. 27  illustrates a plan view of a second magnetic shield feature secured with the bottom case; 
         FIG. 28  illustrates a cross sectional view of the portable computing device with the first magnetic shield feature surrounding the sensor and the second magnetic shield feature secured with the bottom case; 
         FIG. 29  illustrates an isometric view of an embodiment of a top portion of the portable computing device, in accordance with the described embodiments; 
         FIG. 30  illustrates a front isometric view of an embodiment of a retention feature; 
         FIG. 31  illustrates a cross sectional view of the retention feature shown in  FIG. 30 , taken along Section A; 
         FIG. 32  illustrates a rear isometric view of the retention feature; 
         FIG. 33  illustrates an isometric view of the retention feature secured with the top portion; 
         FIG. 34  illustrates a cross sectional view of the central region of the retention feature, taken along Section B in  FIG. 33 ; 
         FIG. 35  illustrates a cross sectional view of the first end region of the retention feature, taken along Section B in  FIG. 33 ; 
         FIG. 36  illustrates an isomeric view of an interior region of a bottom case of a portable computing device, in accordance with the described embodiments; 
         FIG. 37  illustrates a cross sectional view of the bottom case shown in  FIG. 36  taken along Section D in  FIG. 36 ; 
         FIG. 38  illustrates a cross sectional view of the bottom case shown in  FIG. 36  taken along Section E in  FIG. 36 ; 
         FIG. 39  illustrates a plan view of the interior region of the bottom case having several adhesive structures secured with the terrace regions of the bottom case; 
         FIG. 40  illustrates a plan view showing an exterior region of the bottom case having several foot features; 
         FIG. 41  illustrates an isometric view of a corner region of the bottom prior to receiving the first foot feature; 
         FIG. 42  illustrates an isometric view of the corner region of the bottom case shown in  FIG. 40 , with the protrusions of the first foot feature extending through the openings of the bottom case; 
         FIG. 43  illustrates an isometric view of the corner region of the bottom case shown in  FIG. 41 , with a heat deforming member engaging the protrusions; 
         FIG. 44  illustrates an isometric view of the corner region of the bottom case shown in  FIG. 42 , with the protrusions deformed subsequent to a heat staking process; 
         FIG. 45  illustrates a plan view of the first foot feature assembled with the bottom case; and 
         FIG. 46  illustrates a flowchart showing a method for forming a portable computing device. 
     
    
    
     Those skilled in the art will appreciate and understand that, according to common practice, various features of the drawings discussed below are not necessarily drawn to scale, and that dimensions of various features and elements of the drawings may be expanded or reduced to more clearly illustrate the embodiments of the present invention described herein. 
     DETAILED DESCRIPTION 
     Reference will now be made in detail to representative embodiments illustrated in the accompanying drawings. It should be understood that the following descriptions are not intended to limit the embodiments to one preferred embodiment. To the contrary, it is intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the described embodiments as defined by the appended claims. 
     In the following detailed description, references are made to the accompanying drawings, which form a part of the description and in which are shown, by way of illustration, specific embodiments in accordance with the described embodiments. Although these embodiments are described in sufficient detail to enable one skilled in the art to practice the described embodiments, it is understood that these examples are not limiting such that other embodiments may be used, and changes may be made without departing from the spirit and scope of the described embodiments. 
     The following disclosure relates to a portable computing device. In particular, the disclosure relates to a portable computing device that includes a reduced size and shape, as compared to traditional portable computing devices. Certain structural issues associated with the reduced shape and size can be overcome by one or more features described herein. For example, a portable computing device may include a base portion that includes a top case and a bottom case secured with the top case. In order to reduce the size and shape of the portable computing device, the top case and the bottom case may be reduced. Accordingly, an opening of the top case designed to receive several internal components (such as a processor circuit) is also reduced. In order to receive a keyboard assembly electrically coupled with a circuit board having a size larger than that of the opening, the circuit board can be deformed, or bent, and then positioned within the top case. Further, the circuit board may be deformed without causing damage to the circuit board and the keyboard. This allows the top case to retain its reduced size and shape. 
     Another challenge with the smaller top case includes securing the circuit board with the top case. For example, several threaded fasteners used to secure the keyboard assembly to the top case must be positioned in a compact region of the top case. To facilitate this process, the threaded fasteners are secured with several threaded cavities formed in the top case at an angle allowing for improved access to the threaded cavities. When the top case is positioned upside down, the angle may be an acute angle with respect to a horizontal plane below the top case. These threaded cavities are formed at each end of the top case. The threaded cavities may also be defined as “blind holes.” The phrase “blind hole” as used throughout this detailed description and in the claims refers to an opening or cavity that extends partially, but not completely, through a substrate. In this manner, the substrate may include a first region (or first surface) having a blind hole visible when viewing the first region. The substrate may also include a second region (or second surface) opposite the first region such that when viewing the second surface the blind hole is not visible. The circuit board includes several openings corresponding to the number of threaded cavities of the top case. These openings may extend through the circuit board and may be formed at an angle substantially similar to the angle of the threaded cavities. The circuit board is aligned with the top case when the openings of the circuit board are aligned with the threaded cavities. 
     Further, a first alignment tool and a second alignment tool may be used to guide the fasteners through the openings of the circuit board and the threaded cavities. Each alignment tool includes a main body and several fastener receivers secured with the main body. The number of fastener receivers may correspond to the number of threaded cavities in the top case. The fastener receivers are formed at an angle substantially similar to the angle of the openings and threaded cavities. The fastener receivers may also be referred to as washers as the fastener receivers are designed to align and secure the threaded fasteners, as well as distribute some of the load exerted by the threaded fasteners. The first alignment tool and the second alignment tool can be positioned at each end of the keyboard assembly. Also, the first alignment tool and the second alignment tool are aligned with the circuit board when the fastener receivers of the first alignment tool and the second alignment tool are aligned with their respective openings in the circuit board. The threaded fasteners may be inserted into the threaded cavities by extending through the fastener receivers, the openings of the circuit board, and the threaded cavities of the top case. Additional securing means may be included, such as additional fasteners in a central region of the keyboard assembly. Further, an adhesive may be applied to a web region of the top case that defines several openings designed to receive the key caps of the keyboard assembly. 
     The circuit board of the keyboard assembly may include several layers that define a keyboard shield. The keyboard shield serves several functions. For example, a first layer of the keyboard shield may be sealed with the circuit board. In some cases, the first layer is formed from a non-electrically conductive material such as Mylar. The first layer is designed to protect the circuit board as well as other internal components from ingress from contaminants (e.g., dust, liquids). This includes instances when contaminants enter the top case via the web region that receives keys of the keyboard assembly. A second layer may be disposed on the first layer. In some cases, the second layer is formed from an electrically conductive material, such as aluminum or aluminum foil. The second layer provides several features. For example, the second layer provides a portion of an electrical grounding path for internal components electrically coupled with the second layer. Also, the second layer may provide an electromagnetic interference (“EMI”) shield for the circuit board against EMI emitted from internal components. As a result, the second layer may block transmission of electromagnetic energy and/or remove electrical current from some internal components in the device that may otherwise cause a reduction in sensitivity, or “desense,” of other internal components. 
     The keyboard assembly can be further secured with the web region of the top case via several threaded fasteners extending through a central region of the keyboard assembly and through threaded cavities in the web region. As a result, both the first layer and the second layer of the keyboard shield may include several openings, with the openings of the first layer aligned with the openings of the second layer. These openings in the first layer and the second layer are designed to receive a portion of the threaded fasteners (for example, a head portion) located throughout the web region. 
     The keyboard shield may further include a third layer disposed on the second layer. Generally, the third layer is a continuous layer that includes only a few customized openings designed to allow some internal components to electrically connect to the second layer. Otherwise, the third layer, combined with the first layer and the second layer, combine to define several blind holes as the first and second layers include several openings (described above) and the third layer is substantially free of such openings. Also, keyboard shield may include a tail member. The tail feature may be formed from a material or materials having a relatively low coefficient of friction (for example, Teflon). The tail feature is affixed to the keyboard shield in a manner such that the tail feature is proximate to a moving part of the top portion of the portable computing device. The moving part may engage a region of the base portion of the portable computing device causing friction or even unwanted material removal. However, the tail feature is positioned between the moving part and the top portion to engage the moving part allowing the moving part to slide or glide across the tail feature thereby reducing friction or material breakdown between regions of the top portion and the base portion. 
     Still, other issues are associated with a compact portable computing device. In some cases, the circuit board of the keyboard assembly includes a sensor, such as a Hall Effect sensor, designed to detect a magnetic field. In particular, the sensor is designed to detect a magnetic field produced by a magnet located in a top portion (for example, a display housing) of the portable computing device. In this manner, when the top portion rotates, or pivots, sufficiently in a direction toward the base portion, the sensor detects the magnetic field. Then, the sensor can provide an electrical input signal to, for example, a processor circuit causing a display module of the portable computing device to shut down or enter an inactive mode. However, due to the relatively small footprint of the base portion, a magnetic field produced by a magnet external with respect to the portable computing device may be detected by the sensor, even when the magnet is positioned below the base portion, causing the sensor to input a “false trigger” to the main logic board, and shut down or deactivate the display module. 
     In order to reduce, or even eliminate, the false trigger, the base portion may include a first magnetic shield feature. The first magnetic shield feature may be in the shape of a can designed to cover a region of the sensor. The third layer of the keyboard shield may include an opening allowing the first magnetic shield feature to electrically couple with the second layer of the keyboard shield via a conductive adhesive. The first magnetic shield feature is designed to provide a magnetic shield for the sensor to divert unwanted magnetic fields. The base portion may further include a second magnetic shield feature below the first magnetic shield feature. The second magnetic shield feature may be coupled with the bottom case via an adhesive and further shield the sensor from unwanted magnetic fields. The adhesive may include a conductive adhesive and/or a non-conductive adhesive. Also, the first magnetic shield feature and the second magnetic shield feature may be space apart from each other to define an air gap which further facilitates diversion of the magnetic field. 
     Also, one or more flexible circuits may be positioned in both the top portion and extend to the base portion. The flexible circuits are designed to carry data communications between components in the base portion and the top portion. Further, the flexible circuits may supply power from a battery pack located in the base portion to one or more internal components located in the top portion. The flexible circuits may be coupled with an electrical connector in the top portion. However, when the top portion rotates or pivots with respect to the base portion, a force is applied to the flexible circuits can cause the flexible circuits to decouple from an electrical connector in the top portion. 
     In order to offset this force, a retention feature can be installed in the top portion. The retention feature can include multiple extensions used to hook the retention feature into undercut regions of the top portion. The retention feature can further include multiple mounting structures that receive fasteners to further secure the retention feature with the top portion. Also, the retention feature can be formed from an injection molding process using a lightweight polycarbonate material that includes glass fiber. In some cases, the retention feature can be formed with an arch-shaped, or bowed, configuration. For example, a central region of the retention feature may be generally flat while the regions near the edges may be curved. In this manner, the retention feature is designed to apply a preload force to the flexible circuits when the retention feature is installed in the top portion. 
     In order to provide additional space in the portable computing device, an interior region of the bottom case may undergo a material removal process. The material removal process may define several terraced, or stepped, regions. In other words, the bottom case may include various cross sectional elevations. The terraced regions allow the bottom case to receive several internal components, such as battery packs, speaker modules, and/or circuit boards. For example, an internal power supply that includes one or more battery packs can be adhesively secured with one or more terraced regions. Terracing the battery packs in this manner allows for additional volume dedicated to the internal power supply as opposed to a traditional battery pack formed from a rigid, unitary structure and disposed on a flat surface of a traditional bottom case. Accordingly, the operating times of the portable computing device between consecutive charges of the battery packs may increase over the traditional portable computing devices. Although terracing the bottom case requires material removed from the bottom case that can reduce structural rigidity of the bottom case, the internal components, such as the battery packs, when secured with the bottom case, provide structural support to the bottom case. 
     An exterior region of the bottom case can include several foot features designed to engage a surface on which the portable computing device is positioned. However, the terraced region previously described reduces the available thickness of the bottom case to secure the foot features with the bottom case. To maximize the available space for the foot features, a vision system is used to locate the regions of the exterior region of the bottom case in which the foot features may be optimally positioned. A cutting tool, such as a laser ablation tool, can remove material from the exterior region to define the locations of the foot features. The vision system can account for the terraced region and determine the areas of sufficient thickness. Also, a cutting tool can remove additional material to define several openings in the bottom case. Each foot feature may include several protrusions corresponding to the number of openings in the bottom case for each foot feature. Each foot feature is installed by extending the protrusions through the openings of the bottom case from the exterior region of the bottom case to the interior region. Then, a heat deforming member, such as a heat staking tool, capable of deforming, or melting, the protrusions engages the protrusions from the interior region and applies heat to the protrusions. The material from the resultant, deformed protrusions is positioned within a cavity such that each foot feature is mechanically interlocked with the bottom case. Further, the material from the deformed protrusions lies in the cavity and is sub-flush, or below, the interior region. In this manner, the material does not engage and disturb internal components proximate to the foot features. 
     These and other embodiments are discussed below with reference to  FIGS. 1-46 . However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these Figures is for explanatory purposes only and should not be construed as limiting. 
       FIG. 1  illustrates an isometric view of an embodiment of a portable computing device  100  in an open configuration. The portable computing device  100  includes an enclosure  102  designed to hold several internal components. In some embodiments, the enclosure  102  is formed from plastic. In the embodiment shown in  FIG. 1 , the enclosure  102  is made from a metal, such as aluminum. The enclosure  102  can be divided into a top portion  104  and a base portion  106 , with the top portion  104  is designed to pivot or rotate with respect to the base portion  106 . Also, the top portion  104  may be referred to as a display housing as the top portion  104  may include a display module  108  designed to display visual content. Further, the top portion  104  may include a magnet  112  hidden from view. The magnet  112  may generate a magnetic field (not shown) that extends externally with respect to the top portion  104 . The base portion  106  includes a top case  114  and a bottom case (shown later) secured with the top case  114 . As shown, the top case  114  includes several openings defining a web region  116  allowing the key caps  118  of a keyboard assembly to extend through the web region  116 . Also, the base portion  106  may further include a sensor  120 . In some embodiments, the sensor  120  is a Hall Effect sensor designed to detect a magnetic field. For example, when the top portion  104  pivots in a direction toward the base portion  106 , the top portion  104  may be positioned sufficiently close to the base portion  106  such that the sensor  120  can detect the magnetic field from the magnet  112 . Accordingly, the magnet  112  may be defined as a triggering magnet designed to generate a triggering magnetic field detectable by the sensor  120 . Once the magnetic field is detected, the sensor  120  is further designed to generate, or trigger, an electrical signal that may cause the display module  108  to shut down and cease displaying visual content. 
       FIG. 2  illustrates an isometric view of the embodiment of the portable computing device  100  shown in  FIG. 1  in a closed configuration. The closed configuration of the portable computing device  100  is achieved, for example, by rotating or pivoting the top portion  104  to the base portion  106  such that the top portion  104  is approximately parallel with respect to the base portion  106 . The closed configuration shown in  FIG. 2  defines one example of when the sensor  120  can detect the magnetic field generated by the magnet  112  (shown in  FIG. 1 ). 
       FIG. 3  illustrates a bottom view of an interior region  122  of the top case  114 , in accordance with the described embodiments. As shown, the web region  116  includes several central cavities, each of which is designed to receive a fastener to secure an internal component (for example, a keyboard assembly) with a central region of the top case  114 . For example, the web region  116  includes a first central cavity  124  and a second central cavity  126 . In some embodiments, the first central cavity  124  and the second central cavity  126  are internally threaded in order to receive a threaded fastener. Further, the first central cavity  124  and the second central cavity  126  may be blind holes visible only from the bottom view shown in  FIG. 3 . Also, the web region  116  may further include a first alignment pin  128  and a second alignment pin  130 , both of which extend above a plane defined by the web region  116 . The first alignment pin  128  and the second alignment pin  130  are used to align a keyboard assembly (not shown). Although the cavities and alignment pins are shown in particular locations of the web region  116 , the cavities and alignment pins could be located in other locations of the web region  116 . 
     The top case  114  may further include several side rails used to create space between the top case  114  and a bottom case (not shown). For example, the top case  114  can include a first side rail  132  and a second side rail  134 . Also, the top case  114  may include several cavities proximate to the first side rail  132  and the second side rail  134 . For example, the first side rail  132  includes a first end cavity  140 . In some embodiments, the first end cavity  140 , shown as dotted lines, is positioned partially below the first side rail  132  (from a bottom view). In the embodiment shown in  FIG. 3 , the first end cavity  140  is completely below the first side rail  132 . In either case, the first end cavity  140  is positioned between the first side rail  132  and a top portion  136  of the top case  114 . Also, in some embodiments, the first end cavity  140  includes an internal threaded region such that the first end cavity  140  may be in threaded engagement with a fastener (not shown). The first end cavity  140  is a representative end cavity of the remaining end cavities (shown as dotted lines) proximate to the first side rail  132 . The second side rail  134  opposite the first side rail  132  includes a second end cavity  150 , which may also include an internal threaded region. Also, the second end cavity  150  is a representative end cavity of the remaining end cavities (shown as dotted lines) proximate to the second side rail  134 . Also, as shown, the second end cavity  150  is positioned between the first side rail  132  and the top portion  136  of the top case  114 . The end cavities may be designed and positioned to provide further securing means of an internal component, such as a keyboard assembly. Also, although not shown, the interior region  122  of the top case  114  can receive an adhesive, such as a pressure sensitive adhesive (“PSA”). Moreover, the PSA can be applied to the web region  116 . In this manner, a keyboard assembly can be secured with the top case  114  by the PSA prior to inserting the keyboard assembly, and by several fasteners secured to the central cavities of the top case  114  subsequent to inserting the keyboard assembly. 
     The interior region  122  of the top case  114  also includes a material removal region defined by an indention region  160 . The indention region  160  is designed to allow space for moving parts of other components. This will be discussed below. Also, the top case  114  includes an opening  170  defined in part by the first side rail  132  and the second side rail  134 . The opening  170  allows the top case  114  to receive several internal. The opening  170  includes a first dimension  172  which may be defined as a length of the opening  170 . As shown in  FIG. 3 , the first dimension  172  may be referred to a widthwise dimension extending approximately from a first end of the web region  116  to a second end of the web region  116  opposite the first end. Also, as shown, the first dimension  172  is greater than a second dimension  174  of the opening  170 . 
       FIG. 4  illustrates an enlarged view of a partial cross section of the top case  114  shown in  FIG. 3 , showing several end cavities (for example, the first end cavity  140 ) under the first side rail  132 . In some embodiments, the end cavities are formed with a vertical configuration with respect to the top case  114 . In the embodiment shown in  FIG. 4 , the end cavities are formed at an angle with respect to the top case  114 . The end cavities under the second side rail  134  (shown in  FIG. 3 ) may include a similar features. 
     The angle of the end cavities may be designed to facilitate securing fasteners to the end cavities. For example,  FIG. 5  illustrates a cross sectional view of the first side rail  132  and the second side rail  134  of the top case  114  shown in  FIG. 3 . As shown, the first end cavity  140  and the second end cavity  150  are both angled with respect to the top case  114 . Each angle may be described as an acute angle with respect to a horizontal plane  162  below the top case  114  when the top case  114  is positioned upside down as shown in  FIG. 5 . Also, the first end cavity  140  and the second end cavity  150  may include a threaded region. For example, the enlarged view shows the threaded region  142  of the first end cavity  140 . 
       FIG. 6  illustrates an isometric view of an embodiment of a keyboard assembly  210 , in accordance with the described embodiments. The keyboard assembly  210  may be an internal component designed for use in the portable computing device  100  (shown in  FIG. 1 ). As shown, the keyboard assembly  210  includes key caps  118  that may be extend through a web region  116  of the top case  114  (shown in  FIG. 3 ). The key caps  118  may include a QWERTY configuration generally known in the art for a keyboard. Also, the key caps  118  may be secured to a circuit board  220 . In some embodiments, the circuit board  220  is a printed circuit board. As shown, the circuit board  220  includes several central openings, such as a first central opening  224  and a second central opening  226 , both of which extend through the circuit board  220 . When the keyboard assembly  210  is installed in the top case  114  (shown in  FIG. 3 ), the first central opening  224  and the second central opening  226  align with the first central cavity  124  and the second central cavity  126  (shown in  FIG. 3 ), respectively. In this manner, each central opening and central cavity can receive a fastener (not shown) to secure the keyboard assembly  210  to the top case  114 . 
     The circuit board  220  can also include a first alignment opening  228  and a second alignment opening  230 , both of which extend through the circuit board  220 . When the keyboard assembly  210  is installed in the top case  114  (shown in  FIG. 3 ), the first alignment opening  228  and the second alignment opening  230  receive the first alignment pin  128  and the second alignment pin  130  (shown in  FIG. 3 ), respectively, of the top case  114 . 
     The circuit board  220  further includes several end openings, such as the first end opening  240  and the second end opening  250 , both of which extend through the circuit board  220 . The enlarged view shows include a partial cross sectional view showing the first end opening  240 , which may be representative of the remaining end openings of the keyboard assembly  210 . When the keyboard assembly  210  is installed in the top case  114  (shown in  FIG. 3 ), the first end opening  240  and the second end opening  250  align with the first end cavity  140  and the second end cavity  150  (shown in  FIG. 3 ), respectively. In this manner, each end opening and end cavity can receive a fastener (not shown) to further secure the keyboard assembly  210  to the top case  114 . Also, the partial cross sectional view of the circuit board  220  shows the first end opening  240  formed an angle with respect to the circuit board  220 . When the keyboard assembly  210  is installed in the top case  114 , the angle is similar to the angle of the cavities (for example, the first end cavity  140  shown  FIG. 5 ) to define a generally continuous and uninterrupted path for a fastener (not shown). 
     Also, the keyboard assembly  210 , and in particular the circuit board  220 , includes a first dimension  272  which may be defined as a widthwise dimension of the keyboard assembly  210  extending approximately from a first end beyond the first end opening  240  to a second end beyond the second end opening  250 . In some embodiments, the first dimension  272  of the keyboard assembly  210  is greater than the first dimension  172  of the opening  170  (shown in  FIG. 3 ). Accordingly, as shown, the keyboard assembly  210  includes at least one dimension (the first dimension  272 ) which may not fit into the opening  170  of the top case  114 . However, the keyboard assembly  210  is designed to deform or bend without causing damage to the circuit board  220  or other components of the keyboard assembly  210 . This will be described and shown below. 
       FIG. 7  illustrates an isometric view of the keyboard assembly  210  shown in  FIG. 6 , with the keyboard assembly  210  secured with a material handling feature  302 . For purposes of simplicity, the previously-described openings in the keyboard assembly  210  are not shown. In some embodiments, the material handling feature  302  is part of a robotic assembly. As shown, the material handling feature  302  includes a first arm  304  having a first attachment feature  314 , a second arm  306  having a second attachment feature  316 , and third arm  308  having a third attachment feature  318 . In some embodiments, the first attachment feature  314 , the second attachment feature  316 , and the third attachment feature  318  are suction cups capable of engaging the circuit board  220  and securing the keyboard assembly  210  with the material handling feature  302 . As shown, the material handling feature  302  can actuate the first arm  304 , the second arm  306 , and the third arm  308  to combine to apply a deformation force, or bending force, to the keyboard assembly  210  without damaging the keyboard assembly  210  or any of its components, including the circuit board  220 . In this manner, the keyboard assembly  210  may be reduced from the first dimension  272  (shown in  FIG. 6 ) to a second dimension  274  defined as a lengthwise dimension less than the first dimension  272 . Further, the second dimension  274  may be less than the first dimension  172  of the opening  170  of the top case  114  (shown in  FIG. 3 ). This allows the keyboard assembly  210  to be installed in the top case  114 . Accordingly, the keyboard assembly  210  can be defined as a flexible keyboard assembly as the keyboard assembly  210  can flex, or deform, into a bent configuration in response to a force applied to the keyboard assembly  210  by, for example, the material handling feature  302 . Further, the circuit board  220  can be formed from a flexible substrate. 
       FIGS. 8-14  illustrate the process for inserting the keyboard assembly  210  into the top case  114  via the material handling feature  302 .  FIG. 8  illustrates a plan view of the keyboard assembly  210  secured with the material handling feature  302  shown in  FIG. 7 , prior to inserting the keyboard assembly  210  into the top case  114 . As shown, the first dimension  172  of the opening  170  is smaller than that of the first dimension  272  of the keyboard assembly  210 . 
       FIG. 9  illustrates a plan view of the material handling feature  302  carrying the keyboard assembly  210  over the top case  114 , in accordance with the described embodiments.  FIG. 10  illustrates a side view of the material handling feature  302 , the keyboard assembly  210 , and the top case  114  shown in  FIG. 9 . As shown, the material handling feature  302  actuates the first arm  304 , the second arm  306 , and the third arm  308  to provide a deformation force that deforms the keyboard assembly  210  to the second dimension  274  less than the first dimension  172  of the opening  170  of the top case  114 . In this manner, the keyboard assembly  210  includes a reduced size and shape that allows the keyboard assembly  210  to be inserted into the top case  114 . 
       FIG. 11  illustrates a plan view of the material handling feature  302  partially inserting the keyboard assembly  210  into the top case  114 , in accordance with the described embodiments.  FIG. 12  illustrates a side view of the material handling feature  302 , the keyboard assembly  210 , and the top case  114  shown in  FIG. 11 . As shown, the material handling feature  302  actuates the first arm  304  and the second arm  306  to position a portion of the keyboard assembly  210  below the first side rail  132  of the top case  114 . 
       FIG. 13  illustrates a plan view of the material handling feature  302  fully inserting the keyboard assembly  210  into the top case  114 , in accordance with the described embodiments.  FIG. 14  illustrates a side view of the material handling feature  302 , the keyboard assembly  210 , and the top case  114  shown in  FIG. 13 . The keyboard assembly  210  and the circuit board  220  are now in an unbent configuration. As shown, the material handling feature  302  actuates the first arm  304 , the second arm  306 , and the third arm  308  such that portions of the keyboard assembly  210  are under the first side rail  132  and the second side rail  134 . Also, the material handling feature  302  can position the keyboard assembly  210  such that some of the openings of the keyboard assembly  210  align with some of the cavities of the top case  114 . For example, the first end opening  240  and the second end opening  250  of the keyboard assembly  210  are aligned with the first end cavity  140  and the second end cavity  150 , respectively, of the top case  114 . This allows the end openings and the end cavities to receive a fastener (not shown) to secure the keyboard assembly  210  to the top case  114 . It will be appreciated that the remaining end openings are aligned with the remaining end cavities in a similar manner. 
       FIG. 15  illustrates an isometric view of an embodiment of an alignment tool  400 . The alignment tool  400  may be used to align and secure several fasteners that secure the keyboard assembly  210  to the top case  114  (shown in  FIG. 14 ). As shown, the alignment tool  400  includes a main body  402 . In some embodiments, the main body  402  is formed from a metal, such as steel or aluminum. In the embodiment shown in  FIG. 15 , the main body  402  is formed from a polymeric material, such as plastic. Further, the main body  402  may be formed from a recycled material (or materials) which may facilitate the main body  402  decoupling from other features. This will be described below. Secured with the main body  402  are fastener receivers  410 , each of which includes an opening designed to receive one of the fasteners  420 . The fasteners  420  may be formed from a metal to provide electrically conductive properties to the fasteners  420 . Also, the openings of the fastener receivers  410  are formed at an angle with respect to the main body  402 . The angle may be substantially similar to the angle formed in the cavities (such as the second end cavity  150  shown in  FIG. 14 ) and the openings (such as the second end opening  250  shown in  FIG. 14 ) of the keyboard assembly  210 . This allows the fasteners  420  to extend through the fastener receivers  410  at an angle substantially similar to the angles formed for the cavities and openings previously described. The fastener receivers  410  are located on the main body  402  such that the fastener receivers are aligned with the angled openings of the keyboard assembly previously described. This may be useful when the end cavities of a top case are positioned between the side rails and the top portion of the top case. 
     Alternatively, in other embodiments, the fasteners  420  are integrated with alignment tool  400 . For example, the alignment tool  400  can be formed such that fasteners  420  are partially captive in the fastener receivers  410 . In other words, the formation of the fastener receivers  410  could simultaneously include inserting the fasteners  420  into the fastener receivers  410 . 
     Also, in some cases, the keyboard assembly previously described may include regions having sensitive components. As a result, some regions of the keyboard assembly cannot be disturbed by, for example, an opening in the circuit board used to mount the keyboard assembly. In this manner, the alignment tool  400  may further include a first extension  432  and a second extension  434  secured with the main body  402 . The first extension  432  and the second extension  434  are designed to secure a portion of keyboard assembly that does not include an opening to receive a fastener. Also, as shown, the first extension  432  and the second extension  434  can each include an angled portion formed at an angle substantially similar to the angled end openings and the angled end cavities previously described. A fastener  436  positioned between the first extension  432  and the second extension  434  may include a head portion  438  relatively large in diameter and designed to engage both the first extension  432  and the second extension  434 . Further, the fastener  436  may be secured with the top case of a portable computing device at an angle based upon the angled portions of the first extension  432  and the second extension  434 . In other embodiments, one or more of the fastener receivers  410  (shown in  FIG. 15 ) replace the first extension  432  and the second extension  434 . 
     Also, in some cases, the portable computing device  100  (shown in  FIG. 1 ) may be assembled using certain automated assembly processes. This may include the use of automated tools (for example, a robotic arm) used to assemble the various internal components. The automated assembly processes may employ a vision system used to locate various features of the portable computing device onto which the components are to be assembled. In this manner, the alignment tool  400  may further include a first alignment feature  442  and a second alignment feature  444  positioned on the main body  402 . The first alignment feature  442  and the second alignment feature  444  can be used as datum features used by the vision system, giving the vision system reference points to facilitate the placement of components. Further, in some cases, the first alignment feature  442  and the second alignment feature  444  can receive one or more components to define a stacked configuration of components. 
       FIG. 16  illustrates an isometric view of an embodiment of an alternate alignment tool  450 . In some cases, a side rail (for example, a first side rail  132  shown in  FIG. 3 ) of a top case includes one or more openings. The alternate alignment tool  450  can be used to secure a microphone assembly  460  with the top case  114  (shown in  FIG. 4 ) such that a microphone  462  is aligned with the openings in the side rail. As shown, the alternate alignment tool  450  includes several support mechanisms, such as a first support mechanism  452  and a second support mechanism  454  used to receive the microphone assembly  460 . The alternate alignment tool  450  can be made from any material or materials previously described for an alignment tool  400  (shown in  FIG. 15 ). Also, the alternate alignment tool  450  can include a first opening  456  and a second opening  458  which may be used to secure the alternate alignment tool  450  to a top case and/or used as a datum point, or reference, for a vision system previously described. 
       FIG. 17  illustrates a plan view of the alignment tool  400  positioned on the keyboard assembly  210  of the portable computing device  100 . For purposes of illustration, a portion of the second side rail  134  is removed. As shown, each of the fastener receivers  410  secured with the main body  402  receives one of the fasteners  420 . For example,  FIG. 17  shows a first fastener  422  extending through a first fastener receiver  412 . Also, each of the fasteners  420  may extend through end openings (shown in  FIG. 6 ) of the keyboard assembly  210 . Further, each of the fasteners  420  may extend through end cavities (shown in  FIG. 3 ) of the top case  114 . Also, the head portion  438  (of the fastener  436  shown in  FIG. 15 ) is engaged with the first extension  432  and the second extension  434 . 
       FIG. 18  illustrates a cross sectional view taken along line  18 - 18  in  FIG. 17 , showing the first fastener receiver  412  aligning the first fastener  422  with the second end opening  250  of the circuit board  220  and the second end cavity  150  of the top case  114 . The angled configuration of the first fastener receiver  412 , the second end opening  250 , and the second end cavity  150  facilitate the first fastener  422  engaged with the top case  114  at angle. This allows for easier installation when the second end cavity  150  is positioned at least partially between the second side rail  134  and the top portion  136  of the top case  114 , as shown in  FIG. 18 . 
     Referring again to  FIG. 15 , in some cases, certain features of the alignment tool  400  are used for datum points for an automated assembly system. However, in some cases, the automated inspection system does not require the datum points. Further, in order to decrease the overall weight of a portable computing device, the main body  402  can be removed after the fasteners  420  and the fastener  436  in secured with the top case  114 . 
       FIG. 19  illustrates a plan view shown in  FIG. 17 , with the main body of the alignment tool removed subsequent to the installation of the fasteners. With only the fastener receivers  410 , the first extension  432 , and the second extension  434 , the portable computing device  100  can achieve a reduced weight. 
       FIG. 20  illustrates a cross sectional view taken along line  20 - 20  in  FIG. 19 , showing the first fastener receiver  412  installed. In some embodiments, a protrusion is positioned on the alignment tool proximate to the fastener receivers. This may allow the main body to more readily break away from the fastener receivers. In the embodiment shown in  FIG. 20 , the first fastener receiver  412  is attached to a thin region  404  defined as an area of less material thereby facilitating the main body (not shown) breaking away from the first fastener receiver  412 . The thin region  404  may be a representative region proximate to each of the fastener receivers  410  (shown in  FIG. 19 ). 
     Although  FIGS. 15-20  illustrate an alignment tool  400  for use with the second side rail  134  of the portable computing device  100 , it will be appreciated that an alignment tool having corresponding features can also be used to secure the keyboard assembly  210  to the top case  114  in a region associated with the first side rail  132  (shown in  FIG. 3 ). 
       FIG. 21  illustrates a cross sectional view of an alternate embodiment of a portable computing device  500  that includes a retractable fastener  512  as a securing means for a circuit board  520  to a top case  514 , in accordance with the described embodiments. The circuit board  520  may be part of a keyboard assembly (not shown) in accordance with the described embodiments. As shown, the circuit board  520  includes a retractable fastener  512  in threaded engagement with the circuit board  520 . The retractable fastener  512  includes a rotatable head  524  capable of actuation by a tool (not shown) extending through an opening  526  of the top case  514 . 
       FIG. 22  illustrates a cross sectional view of the portable computing device  500  shown in  FIG. 21 , with the retractable fastener  512  securing the circuit board  520  to the top case  514 . The rotatable head  524  rotates about a threaded region  528  of the retractable fastener  512  via a tool  550  extending through the opening  526 . As shown, the rotatable head  524  can engage an interior region of a side rail  534 . In some embodiments, the tool  550  is a screwdriver. When the rotatable head  524  engages the interior region of the side rail  534 , further actuation of the rotatable head  524  may actuate the circuit board  520  in a direction away from the side rail  534 . Once the circuit board  520  is positioned in a desired manner, the tool  550  can be removed from the opening  526 . Also, the retractable fastener  512  may be a representative fastener and the circuit board  520  may include multiple fasteners similar to the retractable fastener  512 . 
       FIG. 23  illustrates an exploded view of several layers defining a keyboard shield  600  used with the keyboard assembly  210 , in accordance with the described embodiments. The keyboard shield  600  may include several layers offering several features. For example, the keyboard shield  600  may include a first layer  602 . In some embodiments, the first layer  602  is formed from a non-electrically conductive material. For example, in some embodiments, the first layer  602  is formed from Mylar. The first layer  602  is designed to seal with a rear portion of the circuit board  220  of the keyboard assembly  210 . Also, the first layer  602  is designed to prevent ingress of contaminants from entering the portable computing device  100  via the openings in the web region  116  (shown in  FIG. 1 ) and extending to internal components susceptible to damage from the contaminants. Also, the first layer  602  includes several openings in locations corresponding to the locations of the central openings of the circuit board  220 . In this manner, a portion of the fasteners and alignment pins used to secure and align, respectively, the keyboard assembly  210  to a top case (not shown) can extend through the openings of the first layer  602 . Further, in some embodiments, the first layer  602  includes a dark color or finish, such as matte black. 
     Also, in some embodiments, the first layer  602  is formed from a unitary layer. In the embodiment shown in  FIG. 23 , the first layer  602  is formed from a first section  612  and a second section  614  separate from the first section  612 . Further, the first section  612  and the second section  614  may be applied to the circuit board  220  by an embossing procedure. In this manner, first section  612  and the second section  614  can accommodate some of the keys of the keyboard assembly  210 , in particular keys in the central region, which may exert a force to the circuit board  220  causing the central region of the circuit board  220  to be non-coplanar, or bow, with respect to remaining regions of the circuit board  220 . 
     The keyboard shield  600  further includes a second layer  604 . In some embodiments, the second layer  604  is formed from an electrically conductive material. For example, in some embodiments, the second layer  604  is formed from aluminum, including aluminum foil. The second layer  604  may be electrically connected to the circuit board  220  via a conductive adhesive  610  disposed on the circuit board  220 . In this manner, the second layer  604  can define part of an electrical grounding path for components electrically connected to the second layer  604 , as the circuit board  220  is electrically connected the top case (not shown) via metal fasteners previously described. Also, similar to the first layer  602 , the second layer  604  includes several openings in locations corresponding to the locations of the central openings of the circuit board  220  and the first layer  602 , thereby allowing a portion of the fasteners and alignment pins to extend through the openings of the second layer  604 . Also, although not shown, the second layer  604  may be formed as a first section and a section in a manner similar to that of the first layer  602 . 
     The keyboard shield  600  may further include a third layer  606 . In some embodiments, the third layer  606  is formed from a non-electrically conductive material, such as Mylar. As shown, the third layer  606  includes a first custom opening  616  and a second custom opening  618 . The first custom opening  616  and the second custom opening  618  allow internal components of a portable computing device to engage the second layer  604  such that the internal components (not shown) are electrically grounded. Although shown in  FIG. 23  in specific locations, the first custom opening  616  and the second custom opening  618  may be formed anywhere throughout the third layer  606  in order to electrically connect an internal component to the second layer  604 . In other embodiments, the third layer  606  includes three or more custom openings. 
     With the exception of the first custom opening  616  and the second custom opening  618 , the third layer  606  is free of openings. Accordingly, the first layer  602  and the second layer  604  can combine with the third layer  606  to define several blind holes. In this manner, a portion of the fasteners extending through the first layer  602  and the second layer  604  are generally shielded via the third layer  606  and therefore not visible. Also, in some embodiments, the third layer  606  includes a dark color or finish, such as matte black. Also, although not shown, the third layer  606  may be formed as a first section and a section in a manner similar to that of the first layer  602 . 
     The keyboard shield  600  may further include a tail feature  620 . When the keyboard shield  600  is secured with the keyboard assembly  210  and when the keyboard assembly  210  is secured with the top case (not shown) in a manner previously described, the tail feature  620  is disposed in the indention region  160  of the top case  114  (shown in  FIG. 3 ). In some embodiments, the tail feature  620  includes TEFLON. In this manner, the tail feature  620  provides a relatively smooth surface for a moving part of the top portion  104  (shown in  FIG. 1 ). As shown, the tail feature  620  is secured with the third layer  606 . However, the tail feature  620  may be secured with the first layer  602  and/or the second layer  604 . 
     Also, although not shown, additional layers may be included with the keyboard shield  600 . For example, in some embodiments, a graphite layer is integrated with the first layer  602 . The graphite layer may provide improved thermal properties. For example, the graphite layer can absorb heat generated by some internal components to spread the heat throughout the graphite layer. In addition, other layers including materials such as steel, carbon fiber, and/or glass fiber can be used. These layers provide additional protection to, for example, a battery pack that may otherwise be susceptible to rupturing if contacted by an internal component. 
       FIG. 24  illustrates an isometric view of the keyboard shield  600  secured to the keyboard assembly  210 . It will be appreciated that, for purposes of illustration, the thickness of the first layer  602 , the second layer  604 , and the third layer  606  may be exaggerated and not in proportion to the circuit board  220 . 
     The portable computing device described is intended to be smaller and more compact as compared to traditional portable computing devices. Accordingly, several features are smaller and thinner than traditional portable computing devices. This may cause issues with other internal components. For example,  FIG. 25  illustrates a cross sectional view of a sensor  120  in the portable computing device  100 . For reference, the sensor  120  was previously shown in  FIG. 1 . As shown in  FIG. 25 , the sensor  120  can be electrically connected to the circuit board  220  of the keyboard assembly  210 . Also, the previously described layers of the keyboard shield  600  may include an opening for the sensor  120 . Also, the sensor  120  may be a Hall Effect sensor designed to detect a magnetic field of a magnet in another location of the portable computing device  100 . However, due to the portable computing device  100  being relatively small, the sensor  120  can detect magnetic field from magnets external with respect to the portable computing device  100 . 
       FIG. 25  shows an electronic device  700  engaged with the bottom case  110  of the portable computing device  100 . The electronic device  700  includes a magnet  702  that generates a magnetic field  704 . Although shown in the electronic device  700 , the magnet  702  can be any magnet external with respect to the portable computing device  100 , either enclosed in a device, as shown, or as a standalone magnet. In some cases, the sensor  120  can detect the magnetic field  704  and send an electrical signal to the portable computing device  100  causing the display module  108  (shown in  FIG. 1 ) to shut down. This unintended consequence of the portable computing device  100  having a smaller form factor can be avoided. 
     Several modifications can be made to the portable computing device to reduce the effects of an external magnetic field. For example,  FIG. 26  illustrates a plan view of a first magnetic shield feature  652  secured with the circuit board  220  and covering the sensor  120 . As shown, the first magnetic shield feature  652  is secured with the second layer  604 . In some embodiments, the first magnetic shield feature  652  is formed from magnetic steel. The first magnetic shield feature  652  may be referred to as a can designed to shield the sensor from external magnetic fields, such as the magnetic field  704  (shown in  FIG. 25 ). Generally, the first magnetic shield feature  652  can be made from any material capable of deflecting a magnetic field. However, the first magnetic shield feature  652  will not inhibit the sensor  120  from detecting a magnetic field from, for example, a magnet  112  disposed in a top portion  104  of the portable computing device  100  (shown in  FIG. 1 ). 
       FIG. 27  illustrates a plan view of a second magnetic shield feature  654  secured with the bottom case  110 . Like the first magnetic shield feature  652 , the second magnetic shield feature  654  is also designed to deflect external magnetic fields. The second magnetic shield feature  654  may be made from any material previously described for the first magnetic shield feature  652 . 
       FIG. 28  illustrates a cross sectional view of the portable computing device  100  with the first magnetic shield feature  652  surrounding the sensor  120  and the second magnetic shield feature  654  secured with the bottom case  110 . As shown, the second magnetic shield feature  654  is generally below the first magnetic shield feature  652  in a dimension (for, example a vertical z-dimension). Generally, the first magnetic shield feature  652  and the second magnetic shield feature  654  are positioned in a potential pathway between the sensor  120  and an external magnetic field generated from an external magnet. Accordingly, the first magnetic shield feature  652  and the second magnetic shield feature  654  combine to define a magnetic shield such that the magnetic field  704  generated by the magnet  702  of the electronic device  700  is diverted in a direction away from the sensor  120 , as shown in  FIG. 28 . The first magnetic shield feature  652  and the second magnetic shield feature  654  are designed to divert or redirect any magnetic field other than the magnetic field generated by the magnet  112  (shown in  FIG. 1 ). In this manner, the sensor  120  does not detect the magnetic field  704  and does not generate the electrical signal in response to the magnet  702  in close proximity to the portable computing device  100 . Also, an air gap  656  defined as a void or space between the first magnetic shield feature  652  and the second magnetic shield feature  654  can further impede the magnetic field  704  from reaching the sensor  120 . 
     The enlarged view shows a portion of the third layer  606  (of the keyboard shield  600 , shown in  FIG. 24 ) partially removed such that the first magnetic shield feature  652  is electrically coupled with the second layer  604  via a first conductive adhesive  662 . The first magnetic shield feature  652  is then electrically grounded. Also, the second magnetic shield feature  654  can be adhesively secured with the bottom case  110  with a second conductive adhesive  664  such that the second magnetic shield feature  654  is also electrically grounded. The first magnetic shield feature  652  and the second magnetic shield feature  654  offer a lightweight and low-cost solution. Further, the sensor  120  can be a relatively simplistic sensor used in prior portable computing devices and need not include complex features. Also, the solution achieve the use of less internal components. For example, a second sensor used as a “confirmation” sensor to detect a second magnet (not shown) in the top portion  104  (shown in  FIG. 1 ) is not required. 
       FIG. 29  illustrates an isometric view of an embodiment of a top portion  104  of the portable computing device, in accordance with the described embodiments. The top portion  104  may also be referred to as a display housing. The display module  108  (shown in  FIG. 1 ) of the top portion  104  is removed to show certain structural features of the top portion  104 . The top portion  104  can include part of a flexible circuit assembly  802  which may include several flexible circuits are partially disposed within the top portion  104 . The flexible circuit assembly  802  may also extend into the base portion  106  (shown in  FIG. 1 ) and electrically connect with one or more components, such as a processor circuit and/or a battery pack. In this manner, the top portion  104  can receive electrical power (from the battery pack) and/or data communication (from the processor circuit) from the base portion  106  via the flexible circuit assembly  802 . As shown, the flexible circuit assembly  802  is coupled with a connector  804  that may be connected to an integrated circuit or another flexible circuit (not shown). However, as the top portion  104  may pivot with respect to the base portion  106 , some moving parts can exert a force on the flexible circuit assembly  802 . In some cases, after several cycles of rotating or pivoting the top portion  104  with respect to the base portion  106 , the force exerted on the flexible circuit assembly  802  may cause the flexible circuit assembly  802  to decouple from the connector  804 . As a result, the flexible circuit assembly  802  no longer relays power and/or data communication to the top portion  104 . 
     The top portion  104  can be modified to receive a feature designed to counter the forces exerted on the flexible circuit assembly  802 . Before installing the feature, the top portion  104  may undergo several material removal processes by a cutting tool (such as a T-cutting tool designed to perform an undercut). For example, the material removal processes can define a first undercut region  806  and a second undercut region  808 , both of which may be referred to as a notch designed to receive a portion of a retention feature (described below). Also, the top portion  104  can include a first mounting hole  812  and a second mounting hole  814  designed to secure a retention feature with the top portion  104 . 
       FIG. 30  illustrates a front isometric view of an embodiment of a retention feature  820 , in accordance with the described embodiments. In some embodiments, the retention feature  820  is formed from a metal (such as aluminum). In the embodiment shown in  FIG. 30 , the retention feature  820  is formed from a polycarbonate material, which may include glass fiber. Further, in some embodiments, the materials used to form the retention feature  820  are injection-molded into a mold cavity (not shown) that defines the size and shape of the retention feature  820 . This allows for a retention feature  820  having both a lightweight and custom design that fits into a relatively small space. 
     The retention feature  820  can include a first end region  822  and a second end region  824  opposite the first end region  822 . The first end region  822  and the second end region  824  may include a first extension  826  and a second extension  828 , respectively. The first extension  826  and the second extension  828  are designed to enter, or hook, into the first undercut region  806  and the second undercut region  808  (shown in  FIG. 29 ), respectively. In other embodiments, the retention feature  820  includes three or more extensions, and accordingly, the top portion  104  (shown in  FIG. 29 ) includes a corresponding number of undercut regions. Also, the first end region  822  and the second end region  824  may further include a first mounting structure  832  and a second mounting structure  834 , respectively. When the retention feature  820  is installed in the top portion  104 , the first mounting structure  832  and the second mounting structure  834  align with the first mounting hole  812  and the second mounting hole  814  (shown in  FIG. 29 ), respectively. 
     The retention feature  820  further includes a central region  840 . The central region  840  is designed to engage the flexible circuit assembly  802  (shown in  FIG. 29 ) and combine with the extensions and/or mounting structures (described above) to apply a retention force that counteracts external forces applied to the flexible circuit assembly  802 . In this manner, the flexible circuit assembly  802  remains relatively stationary in a location proximate to the connector  804  (shown in  FIG. 29 ) despite multiple pivoting events of the top portion  104  (shown in  FIG. 29 ) with respect to a base portion (such as the base portion  106  shown in  FIG. 1 ). 
       FIG. 31  illustrates a cross sectional view of the retention feature  820  shown in  FIG. 30 , taken along Section A. As shown, the first extension  826  extends away from the retention feature  820  to engage the first undercut region  806  (shown in  FIG. 29 ). It will be appreciated that the second extension  828  (shown in  FIG. 30 ) includes a substantially similar profile as that of the first extension  826 . 
       FIG. 32  illustrates a rear isometric view of the retention feature  820 . As shown, the retention feature  820  can include a compressible member  842  designed to engage the flexible circuit assembly  802  (shown in  FIG. 29 ). In some embodiments, the compressible member  842  is formed from a foam material secured to the central region  840 . Also, the retention feature  820  can be arched or bowed to provide a pretension or preload force when installed. For example, as shown, the first end region  822  and the second end region  824  are elevated with respect to the central region  840  to define a bowed configuration. An imaginary horizontal line  850  is included for reference to illustrate the bowed configuration at the first end region  822  and the second end region  824 . 
       FIG. 33  illustrates an isometric view of the retention feature  820  secured with the top portion  104 . Only relevant portions of the top portion  104  are shown in  FIG. 33 . The first extension  826  and the second extension  828  are first inserted, or hooked, into the first undercut region  806  and the second undercut region  808 , respectively. In this configuration, the first extension  826 , the second extension  828 , the central region  840 , and the compressible member (not shown) combine to define a counteracting force that counteracts external forces that may decouple the flexible circuit assembly  802  from the top portion  104 . In this manner, the flexible circuit assembly  802  remains relatively immobile in a location proximate to the connector  804 . Then, the first mounting structure  832  and the second mounting structure  834  receive a first fastener  852  and a second fastener  854 , respectively, to secure the retention feature  820  with the top portion  104 . This may also increase the counteracting force. 
       FIG. 34  illustrates a cross sectional view of the central region  840  of the retention feature  820 , taken along Section B in  FIG. 33 . As shown, the compressible member  842  in the central region  840  engages the flexible circuit assembly  802  such that the flexible circuit assembly  802  is engaged with the top portion  104 , thereby limiting the overall movement of the flexible circuit assembly  802  in a location proximate to the connector  804 . 
       FIG. 35  illustrates a cross sectional view of the first end region  822  of the retention feature  820 , taken along Section C in  FIG. 33 . As shown, the first extension  826  engages the first undercut region  806  of the top portion  104  to provide part of the counteracting force of the retention feature  820 . It will be appreciated that the second extension  828  and the second undercut region  808  (shown in  FIG. 33 ) include substantially similar features and configurations. 
       FIG. 36  illustrates an isomeric view of an interior region  902  of a bottom case  110  of a portable computing device, in accordance with the described embodiments. The bottom case  110  is designed to engage a top case  114  and provide a base for a portable computing device  100  (shown in  FIG. 1 ). As shown, the bottom case  110  has undergone multiple material removal processes to define several terraced regions through the bottom case  110 . For example, the bottom case  110  includes a first terraced region  912  and a second terraced region  914 , both of which are positioned at a substantially similar vertical elevation within the bottom case  110 . Also, the bottom case may further include a third terraced region  916  and a fourth terraced region  918 , both of which are positioned at a substantially similar vertical elevation within the bottom case  110 . However, the third terraced region  916  and the fourth terraced region  918  are positioned at an elevation higher than that of the first terraced region  912  and the second terraced region  914 . Also, the bottom case may further include a fifth terraced region  922  and a sixth terraced region  924 , both of which are positioned at a substantially similar vertical elevation within the bottom case  110 . The fifth terraced region  922  and the sixth terraced region  924  are positioned at an elevation higher than that of the third terraced region  916  and the fourth terraced region  918 . The terraced regions previously described provide additional space for a portable computing device in order to compensate for a smaller form factor of the portable computing device. For example, the terraced regions can receive one or more battery packs. This allows for additional volume for the one or more battery packs as opposed to a traditional battery defined by a single, unitary structure. 
     The bottom case  110  may further include additional regions defined by the material removal processes. For example, as shown, the bottom case  110  includes a first spline region  932 , a second spline region  934 , and a third spline region  936 . The first spline region  932 , the second spline region  934 , and the third spline region  936  may provide support to the bottom case  110  by, for example, engaging the top case  114  (shown in  FIG. 1 ). Further, the first spline region  932 , the second spline region  934 , and the third spline region  936  further define an area in which an internal component (for example, an integrated circuit) can be received by the bottom case  110 . Also, the bottom case  110  can include an additional material removal process to define a cavity  938  designed to receive an additional internal component. 
     In some embodiments, a single material removal process with a particular cutting tool is used. In the embodiment shown in  FIG. 36 , a first cutting process is performed to the bottom case  110 . The first cutting process uses a first cutting tool. Also, the first cutting process can be referred to a “rough” cut as a substantial portion of the bottom case  110  is removed. The pattern taken by the first cutting process can be performed in a raster scan operation, or alternatively, in a spiral pattern. Then, a second subsequent cutting process can be performed. The second cutting process can include a second cutting tool with a larger radius than that of the first cutting tool. In this manner, the edges defined by the second cutting tool are generally smoother and reduce the probability of sharp edges that can cut internal components, such as the battery packs. Also, a two-part cutting process can reduce manufacturing times of the bottom case  110  as opposed to a traditional, single cutting operation. 
     Also, the corner regions of the bottom case  110  include a pair of openings designed to receive a foot feature that engages a surface on which the bottom case  110  can be positioned. For example, the first corner region  940  includes a first cavity  942  and a second cavity  944 , both of which may include multiple openings (not shown). These will be described in detail below. 
       FIGS. 37 and 38  are cross sectional views of  FIG. 36  to illustrate the various elevations of the bottom case  110  defined by the two-part material removal process.  FIG. 37  illustrates a cross sectional view of the bottom case shown in  FIG. 36 , taken along Section D. As shown, in the z-dimension, the first terraced region  912  is below the third terraced region  916 , which in turn is below the fifth terraced region  922 . 
       FIG. 38  illustrates a cross sectional view of the bottom case shown in  FIG. 36 , taken along Section E. The second spline region  934  and the third spline region  936  are higher in elevation in a z-dimension than a region between the second spline region  934  and the third spline region  936 . Also, the cavity  938  is lower in the z-dimension as compared to other cross sectional regions of the bottom case  110  shown in  FIG. 38 . 
       FIG. 39  illustrates a plan view of the interior region  902  of the bottom case  110  having several adhesive structures secured with the terrace regions of the bottom case  110 . For instance, the first terraced region  912  and the second terraced region  914  include a first adhesive ring  952  and a second adhesive ring  954 , respectively. Also, a central region  946  of the bottom case  110  includes a third adhesive ring  956  and a fourth adhesive ring  958 . The adhesive rings may be used to secure internal components (for example, battery packs) with the bottom case  110 . In some embodiments, the adhesive rings are formed from a PSA. Also, the adhesive rings have a size and a shape to provide sufficient adhesive forces to the internal components. Moreover, the adhesive rings are not excessively large to provide unnecessary adhesion forces. In this manner, a portable computing device (such as the portable computing device  100  in  FIG. 1 ) can be made with a reduced weight based upon considerations of the size and shape of the adhesive rings. 
     The bottom case  110  may include additional adhesive structures. For example, a first adhesive structure  962  is located between the first spline region  932 , the second spline region  934 , and the third spline region  936 . In some embodiments, the first adhesive structure  962  secures an internal component, such as an integrated circuit or a speaker module, with the bottom case  110 . Also, the cavity  938  may include a second adhesive structure  964  designed to secure another internal component with the bottom case  110 . The first adhesive structure  962  and the second adhesive structure  964  may include a PSA. By securing internal components to the bottom case  110 , the overall structural rigidity of the bottom case  110  is increased and therefore compensates for a bottom case  110  that is relatively thin due to the material removal process. 
       FIG. 40  illustrates a bottom view showing an exterior region  1002  of the bottom case  110  having several foot features. For example, the first corner region  940  of the bottom case  110  includes a first foot feature  1012  secured with the bottom case  110 . The bottom case  110  further includes a second foot feature  1014 , a third foot feature  1016 , and a fourth foot feature  1018 . In some embodiments, the first foot feature  1012 , the second foot feature  1014 , the third foot feature  1016 , and the fourth foot feature  1018  are made from a rubber material. Due to the spacing limitations created by the terraced regions previously described, a particular process described below is developed to secure the foot features with the bottom case  110 . 
       FIGS. 41-44  illustrate a process for installing the first foot feature  1012  with the bottom case  110 , and serves as an exemplary process for the remaining foot features.  FIG. 41  illustrates an isometric view of the first corner region  940  of the bottom case  110  prior to receiving the first foot feature  1012 . As shown, the first cavity  942  of the bottom case  110  includes a first opening  972  and a second opening  974  designed to receive a first protrusion  1022  and a second protrusion  1024 , respectively, of the first foot feature  1012 . Further, the second cavity  944  of the bottom case  110  includes a third opening  976  and a fourth opening  978  designed to receive a third protrusion  1026  and a fourth protrusion  1028 , respectively. Using several protrusions offers a more robust first foot feature  1012  that can withstand, for example, a first protrusion  1022  breaking off of the first foot feature  1012 . In other words, the remaining protrusions are capable of securing the first foot feature  1012  with the bottom case  110  in the event the first protrusion  1022  is detached from the first foot feature  1012 . 
     Also, the exterior region  1002  can include a laser ablation region  1030  that defines a further material removal process in which the first foot feature  1012  will be positioned. Also, although not shown, an adhesive, such as PSA, can be positioned within the laser ablation region  1030 , and is used to further secure the first foot feature  1012  with the bottom case  110 . 
       FIG. 42  illustrates an isometric view of the first corner region  940  of the bottom case  110  shown in  FIG. 40 , with the protrusions of the first foot feature  1012  extending through the openings of the bottom case  110 .  FIG. 43  illustrates an isometric view of the first corner region  940  of the bottom case shown in  FIG. 42 , with a heat deforming feature  1100  engaging the protrusions of the first foot feature  1012 . The heat deforming feature  1100  can define a heat staking process designed to melt the protrusions. The heat deforming feature  1100  can include a first heating member  1102  designed to heat and melt the first protrusion  1022  and the second protrusion  1024  (shown in  FIG. 41 ). Also, the heat deforming feature  1100  can include a second heating member  1104  designed to heat and melt the third protrusion  1026  and the fourth protrusion  1028  (shown in  FIG. 41 ). Once the melting process is finished, the heat deforming feature  1100  can be removed. 
       FIG. 44  illustrates an isometric view of the first corner region  940  of the bottom case  110  shown in  FIG. 43 , with the protrusions deformed subsequent to a melting process. The first protrusion  1022  and the second protrusion  1024  (shown in  FIG. 41 ) are melted and cured to define a first mechanical interlock  1032  in the first cavity  942  between the first foot feature  1012  and the bottom case  110 . Also, the third protrusion  1026  and the fourth protrusion  1028  (shown in  FIG. 41 ) are melted and cured to define a second mechanical interlock  1034  in the second cavity  944  between the first foot feature  1012  and the bottom case  110 . In this manner, the first foot feature  1012  can be secured with the bottom case  110  via the first mechanical interlock  1032 , the second mechanical interlock  1034 , and in some cases, an adhesive layer (not shown). Also, the first cavity  942  and the second cavity  944  are designed such that the first mechanical interlock  1032  and the second mechanical interlock  1034  are sub-flush, or below, the interior region  902  of the bottom case, as shown in  FIG. 44 . In this manner, the first mechanical interlock  1032  and the second mechanical interlock  1034  do not disturb other internal components, such as a battery pack, proximate to the first cavity  942  and/or the second cavity  944 . 
       FIG. 45  illustrates a bottom view of the first foot feature  1012  assembled with the bottom case  110 . As shown, the first foot feature is within the laser ablation region  1030 . This process can be performed on the remaining foot features. 
       FIG. 46  illustrates a flowchart  1200  showing a method for assembling a portable computing device is described. In step  1202 , a first protrusion of a foot feature extends through a first opening of an enclosure. The first protrusion and the foot feature may be formed from a polymeric material, such as rubber and/or plastic, with the first protrusion designed to melt and deform in response to heat. In step  1204 , a second protrusion of the foot feature extends through a second opening of the enclosure. The second protrusion may include any features previously described for the first protrusion. Also, the foot feature may include additional protrusions, such as a third protrusion and a fourth protrusion. Further, the portable computing device may include several additional foot features in addition to the foot feature described. 
     In step  1206 , heat is received at the first protrusion and the second protrusion to melt the first protrusion in a first cavity of the enclosure and to melt the second protrusion in a second cavity of the enclosure. Also, the second cavity may be different from the first cavity. The first protrusion and the second protrusion melt within the first cavity and the second cavity, respectively, in a manner such that the resultant melted (and cured) material remains sub-flush, or below, the respective cavities. 
     Various aspects of the described embodiments can be implemented by software, hardware or a combination of hardware and software. The described embodiments can also be embodied as computer readable code on a computer readable medium for controlling manufacturing operations or as computer readable code on a computer readable medium for controlling a manufacturing line. The computer readable medium is any data storage device that can store data which can thereafter be read by a computer system. Examples of the computer readable medium include read-only memory, random-access memory, CD-ROMs, HDDs, DVDs, magnetic tape, and optical data storage devices. The computer readable medium can also be distributed over network-coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. 
     The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the described embodiments. However, it will be apparent to one skilled in the art that the specific details are not required in order to practice the described embodiments. Thus, the foregoing descriptions of the specific embodiments described herein are presented for purposes of illustration and description. They are not targeted to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to one of ordinary skill in the art that many modifications and variations are possible in view of the above teachings.

Metadata:
Filing Date: 20150812
Publication Date: 20171212
Grant Date: 20171212
Priority Date: 20150122
Inventors: REID NICHOLAS I.
BLUM MATTHEW W.
CAMPOS FABIO T.
FARAHANI HOUTAN R.
Assignee: APPLE INC
CPC Classifications: [{"code": "B29L2031/3481", "inventive": false, "first": false, "tree": "[]"}, {"code": "B29C65/606", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1662", "inventive": true, "first": true, "tree": "[]"}, {"code": "G06F1/1656", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1616", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1616", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1637", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1656", "inventive": true, "first": false, "tree": "[]"}, {"code": "B29L2031/3481", "inventive": false, "first": false, "tree": "[]"}, {"code": "B29C65/606", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/1662", "inventive": true, "first": true, "tree": "[]"}]
Family ID: 56432572