SEMICONDUCTOR DEVICE, ELECTRONIC APPARATUS, AND MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE

To stabilize a manufacturing yield by suppressing occurrence of scratches and stains on a transparent member provided so as to cover a semiconductor element from a front surface side in a semiconductor device. A semiconductor device includes a substrate, a semiconductor element that is provided on the substrate, a transparent member that is provided on the semiconductor element through a support part, and a sealing resin part that is formed around the semiconductor element and the transparent member on the substrate, and the sealing resin part has a protrusion part having an upper surface thereof perpendicular to the plate thickness direction of the substrate, the upper surface being positioned above a front surface of the transparent member in the plate thickness direction.

TECHNICAL FIELD

The present disclosure relates to a semiconductor device, an electronic apparatus, and a manufacturing method of a semiconductor device.

BACKGROUND ART

As a semiconductor device including an imaging element such as a CMOS image sensor and a semiconductor element such as a light-emitting element such as a semiconductor laser, there has been a device including the following package structure in the past. That is, a package structure in which a transparent member such as a plate-like glass is provided so as to cover a semiconductor element mounted on a substrate from an upper side (front surface side) and a sealing resin part is provided around the semiconductor element and the transparent member on the substrate has been provided (see, for example, PTL 1).

In a manufacturing process of a semiconductor device, a semiconductor chip is generally picked up by a suction collet when the semiconductor chip is conveyed. In the case of the semiconductor chip having the package structure as described above, the semiconductor chip is subjected to suction by the collet on a side where the transparent member is provided to the semiconductor element.

CITATION LIST

Patent Literature

SUMMARY

Technical Problem

In the package structure described above, a front surface (upper surface) of the transparent member becomes the uppermost surface in the package structure. Therefore, when being picked up by the collet, the semiconductor chip is subjected to a suction action by the collet on the front surface of the transparent member.

When the semiconductor chip is subjected to the suction action of the flat collet on the front surface of the transparent member, there is a risk that the collet interferes with the transparent member to scratch the transparent member or stains of the collet adhere to the transparent member to contaminate the transparent member. Occurrence of scratches and contamination in the transparent member causes a reduction in manufacturing yield. Therefore, in order to allow the collet to exert the suction action on regions other than the transparent member, a countermeasure of using a dedicate collet according to the type of package structure or the like is conceivable, and such a countermeasure is not preferable from the viewpoint of cost and the like.

An object of the present technique is to provide a semiconductor device, an electronic apparatus, and a manufacturing method of a semiconductor device that can suppress the occurrence of scratches and stains on a transparent member provided so as to cover a semiconductor element from the front surface side and can stabilize the manufacturing yield.

Solution to Problem

A semiconductor device according to the present technique includes a substrate, a semiconductor element that is provided on the substrate, a transparent member that is provided on the semiconductor element through a support part, and a sealing resin part that is formed around the semiconductor element and the transparent member on the substrate, and the sealing resin part has a protrusion part having an upper surface thereof perpendicular to a plate thickness direction of the substrate, the upper surface being positioned above a front surface of the transparent member in the plate thickness direction.

In another aspect of the semiconductor device according to the present technique, in the semiconductor device, a dimension between the front surface of the transparent member and the upper surface of the protrusion part is 10 to 200 μm in the plate thickness direction.

In still another aspect of the semiconductor device according to the present technique, in the semiconductor device, the transparent member has a rectangular plate-like outer shape with one plate surface as the front surface, the protrusion part is formed in a frame shape by four side parts along a rectangular outer shape of the transparent member in plan view, and a width of each side part of the protrusion part is 100 μm or more.

In yet another aspect of the semiconductor device according to the present technique, in the semiconductor device, the protrusion part has a transparent member covering part extending on the front surface of the transparent member so as to cover an edge part of the front surface of the transparent member.

In further aspect of the semiconductor device according to the present technique, in the semiconductor device, a sealing resin receiving part that is provided at an edge part on the front surface of the transparent member and is in contact with the protrusion part on an outer side surface is provided.

An electronic apparatus according to the present technique includes a semiconductor device including a substrate, a semiconductor element that is provided on the substrate, a transparent member that is provided on the semiconductor element through a support part, and a sealing resin part that is formed around the semiconductor element and the transparent member on the substrate, and the sealing resin part has a protrusion part having an upper surface thereof perpendicular to a plate thickness direction of the substrate, the upper surface being positioned above a front surface of the transparent member in the plate thickness direction.

A manufacturing method of a semiconductor device according to the present technique includes a step of mounting a semiconductor element on a substrate, a step of providing, on the semiconductor element through a support part, a transparent member with at least a peripheral edge part of a front surface covered with a protective material, and a step of forming a sealing resin part around the semiconductor element and the transparent member on the substrate by use of a mold.

In another aspect of the manufacturing method of a semiconductor device according to the present technique, in the manufacturing method of a semiconductor device, as the protective material, a film-like member that wholly covers the front surface of the transparent member or partially covers the front surface except the peripheral edge part of the front surface is used, and a step of removing the protective material is included after the step of forming the sealing resin part.

In still another aspect of the manufacturing method of a semiconductor device according to the present technique, in the manufacturing method of a semiconductor device, the transparent member has a rectangular plate-like outer shape with one plate surface as the front surface, and, as the protective material, a material having a substantially rectangular outer shape corresponding to the front surface of the transparent member in plan view, and having at least any one of recess parts formed on four side parts and R-shaped parts formed at four corner parts in the outer shape in plan view is used.

In yet another aspect of the manufacturing method of a semiconductor device according to the present technique, in the manufacturing method of a semiconductor device, as the protective material, a material having a base material formed by a predetermined material and an adhesive layer for pasting the base material to the transparent member is used.

In further aspect of the manufacturing method of a semiconductor device according to the present technique, in the manufacturing method of a semiconductor device, the transparent member has a rectangular plate-like outer shape with one plate surface as the front surface, as the protective material, a material having a substantially rectangular outer shape corresponding to the front surface of the transparent member in plan view, having recess parts formed on four side parts in the outer shape in plan view, and having a base material formed by a predetermined material and an adhesive layer for pasting the base material to the transparent member is used, and a recess amount of each of the recess parts with respect to a virtual straight line along a rectangular shape in the outer shape in plan view is 0.7 to 1.3 times a thickness of the adhesive layer.

In still further aspect of the manufacturing method of a semiconductor device according to the present technique, in the manufacturing method of a semiconductor device, the predetermined material for forming the base material includes PET, and the adhesive layer is formed by use of an acrylic resin adhesive.

In yet further aspect of the manufacturing method of a semiconductor device according to the present technique, in the manufacturing method of a semiconductor device, in the step of forming the sealing resin part, a resin material in a liquid state at normal temperature is used as a resin material for forming the sealing resin part.

DESCRIPTION OF EMBODIMENTS

The present technique is intended to suppress the occurrence of scratches and stains on a transparent member in a manufacturing process of a semiconductor device and to reduce the cost by devising the shape of a sealing resin part formed around a semiconductor element and the transparent member on a substrate, a method of forming the sealing resin part, and the like. Hereinafter, modes (hereinafter, referred to as “embodiments”) for carrying out the present technique will be described with reference to the drawings. In the embodiments described below, an example of an imaging device (solid-state imaging device) including a solid-state imaging element that is an example of a semiconductor element will be described as a semiconductor device. It should be noted that the drawings are schematic, and the proportion and the like of dimensions of each part do not necessarily match the actual ones. In addition, it is obvious that parts that are different in relation and proportion of the dimensions from each other are included among the drawings. The embodiments will be described in the following order.1. Configuration example of imaging device according to first embodiment2. Manufacturing method of imaging device according to first embodiment3. Configuration example of imaging device according to second embodiment4. Manufacturing method of imaging device according to second embodiment5. Configuration example of imaging device according to third embodiment6. Manufacturing method of imaging device according to third embodiment7. Manufacturing method of imaging device according to fourth embodiment8. Configuration example of electronic apparatus

<1. Configuration Example of Imaging Device According to First Embodiment>

A configuration example of an imaging device according to a first embodiment of the present technique will be described with reference toFIG.1andFIG.2. It should be noted that a vertical direction inFIG.1is assumed to be the vertical direction in an imaging device1.

As depicted inFIG.1andFIG.2, the imaging device1is a kind of semiconductor device, and includes a substrate2, an image sensor3as a solid-state imaging element provided on the substrate2, a glass4as a transparent member, and a sealing resin part5formed at a peripheral part of the imaging device1. In addition, the imaging device1includes a support part6that is a rib resin part supporting the glass4on the image sensor3by being interposed between the image sensor3and the glass4, and a plurality of bonding wires7as connection members.

The imaging device1includes a hollow package structure in which the glass4is mounted on the image sensor3through the support part6and a cavity8is formed between the image sensor3and the glass4. In the imaging device1, the glass4is supported against the image sensor3by the support part6provided on a front surface3athat is the surface on a light receiving side of the image sensor3so as to be opposed to the front surface3a. The periphery between the image sensor3and the glass4is sealed by the support part6, and the void-like cavity8is formed.

The substrate2is an organic substrate including an organic material such as plastic as a base material and is a circuit substrate in which a predetermined circuit pattern formed by use of a metal material is formed. However, the substrate2may be another kind of substrate such as a ceramic substrate formed by use of ceramics or the like as a material.

The substrate2has a rectangular plate-like outer shape and has a front surface2aon which the image sensor3is mounted, a rear surface2bthat is a plate surface on the opposite side thereof, and four side surfaces2c. The image sensor3is die-bonded to the front surface2aside of the substrate2. The image sensor3is bonded to the front surface2aof the substrate2by a joint layer9including a die bond material such as an insulating or conductive adhesive.

The image sensor3is a semiconductor element including a semiconductor substrate including silicon (Si) as an example of a semiconductor. The image sensor3is a rectangular plate-like chip, the front surface3aside that is the upper (one) plate surface is the light receiving surface side, and the opposite (the other) plate surface is a rear surface3b. The image sensor3has four side surfaces3c. A plurality of light receiving elements (photoelectric conversion elements) is formed on the front surface3aside of the image sensor3. The image sensor3is a CMOS (Complementary Metal Oxide Semiconductor) type image sensor. However, the image sensor3may be another imaging element such as a CCD (Charge Coupled Device) type image sensor.

The image sensor3has, as a light receiving part on the front surface3aside, a pixel region12including a large number of pixels11formed in a predetermined array such as, for example, a Bayer array, and a region around the pixel region12is a peripheral region. A predetermined peripheral circuit is formed in the peripheral region. The pixels11each have a photodiode as a photoelectric conversion part having a photoelectric conversion function and a plurality of pixel transistors.

On the front surface3aside of the image sensor3, color filters and on-chip lenses are formed on the semiconductor substrate in such a manner as to correspond to the respective pixels11through an anti-reflection film including an oxide film or the like, a flattened film including an organic material, and the like. Light incident on the on-chip lens is received by the photodiode through the color filter, the flattened film, and the like. It should be noted that the configuration of the image sensor3according to the present technique is not particularly limited.

The glass4is an example of a transparent member serving as an optical window and is provided on the image sensor3through the support part6. The glass4has a rectangular plate-like outer shape with one plate surface as a front surface4aand has substantially the same outer dimension as the image sensor3in plan view. The glass4is provided on the front surface3aside of the image sensor3so as to substantially match the outer shape of the image sensor3in plan view and to be separated at a predetermined interval in parallel with the image sensor3. The glass4has a front surface4athat is an upper surface, a rear surface4bthat is the other plate surface on the opposite side and is a lower surface facing the image sensor3, and four side surfaces4c. The glass4is supported against the image sensor3by the support part6in a fixed state.

The glass4transmits various types of light incident from the front surface4aside through an optical system such as a lens positioned above the glass4. The light transmitted through the glass4reaches the light receiving surface of the image sensor3through the cavity8. The glass4has a function of protecting the light receiving surface side of the image sensor3. It should be noted that, as a transparent member according to the present technique, for example, a plastic plate, a silicon plate that transmits only infrared light, or the like can be used instead of the glass4.

In the present embodiment, the glass4has an outer shape slightly larger than the image sensor3in plan view. That is, the glass4has an outer dimension with a little larger size than the image sensor3in plan view and is provided so as to position its four rectangular edges outside four edges of the image sensor3. However, the size relation between the glass4and the image sensor3is not particularly limited.

The support part6is interposed between the image sensor3and the glass4and is bonded in a state where they are separated from each other, so that the cavity8that is a sealed space is formed between the image sensor3and the glass4. The support part6is provided in the peripheral region so as to surround the pixel region12on the front surface3aof the image sensor3. The lower side of the support part6is connected to the front surface3aof the image sensor3, and the upper side thereof is connected to the rear surface4bof the glass4. The support part6functions as a sealing part for hermetically sealing the periphery of the cavity8, and blocks, together with the glass4, the intrusion of moisture (water vapor), dust, or the like from the outside into the cavity8.

The support part6is provided over the whole circumference along the outer shape of each of the image sensor3and the glass4in plan view and is formed with no ends so as to form a rectangular frame in plan view. The support part6is provided at a position within the range of the outer shape of the glass4so as to follow the outer edge of the glass4in plan view. The support part6is provided at a position slightly inside the side surfaces4cof the glass4. However, the support part6may be provided such that the outer surface thereof is substantially flush with the side surfaces4cof the glass4.

The support part6is formed including an insulating material. Specifically, the material forming the support part6is, for example, a photosensitive adhesive such as a UV (ultraviolet) curable resin that is an acrylic resin, a thermosetting resin such as an epoxy resin, or a mixture thereof. The support part6is formed on the front surface3aof the image sensor3by coating with a dispenser, patterning using photolithography, or the like. It should be noted that the support part according to the present technique is not limited to those including resin, and may be provided by pasting, for example, a structure including an inorganic material such as ceramics such as glass, metal, or silicon to the image sensor3and the glass4with an adhesive or the like.

The bonding wire7is a conductive wire for electrically connecting the substrate2and the image sensor3to each other. The bonding wire7is, for example, a thin metal wire including Au (gold), Cu (copper), Al (aluminum), or the like. The bonding wire7electrically connects a lead terminal13formed on the front surface2aof the substrate2to an electrode pad14formed on the front surface3aof the image sensor3as a terminal for transmitting and receiving signals to/from the outside.

A plurality of lead terminals13is formed on the front surface2aof the substrate2in a predetermined array at regions outside the mounting part of the image sensor3and receives connection on the one end sides of the bonding wires7. A plurality of electrode pads14is formed on the front surface3aof the image sensor3in a predetermined array at regions outside the support part6and receives connection on the other end sides of the bonding wires7. The electrode pads14and connection parts of the bonding wires7to the electrode pads14are covered with the support part6. However, the arrangement positions of the electrode pads14and the support part6are not particularly limited.

As the material of the lead terminals13and the electrode pads14, for example, an aluminum material or the like is used. Specifically, the lead terminals13and the electrode pads14are formed by coating a layer part of, for example, copper (Cu), tungsten (W), titanium (Ti), or the like with a plating layer of nickel (Ni) and a plating layer of gold (Au). The lead terminals13and the electrode pads14are formed by appropriately using plating, sputtering, printing, or other film forming methods.

The plurality of lead terminals13of the substrate2is electrically connected to a plurality of terminal electrodes formed on the rear surface2bside of the substrate2through a predetermined wiring part formed in the substrate2. Each terminal electrode is provided with a solder ball15. For example, the solder balls15are formed in two-dimensional lattice point-like arrangement so as to follow the rectangular outer shape of the image sensor3and configure BGA (ball grid array). The solder balls15serve as terminals for making an electrical connection to the circuit substrate on which the imaging device1is mounted in an electronic apparatus on which the imaging device1is mounted.

In the imaging device1having the above configuration, light transmitted through the glass4passes through the inside of the cavity8and is received and detected by a light receiving element configuring each pixel11arranged in the pixel region12of the image sensor3.

The sealing resin part5is formed around the image sensor3and the glass4on the peripheral part of the substrate2. The sealing resin part5is a resin part that covers the bonding wires7and the connection parts of the bonding wires7to the substrate2. That is, the periphery of the bonding wires7that is outside the cavity8on the substrate2is covered and sealed with the sealing resin part5.

The sealing resin part5covers and seals the whole circumference around the image sensor3and the glass4on the substrate2. Specifically, the sealing resin part5entirely covers the peripheral part of the front surface2aof the substrate2on which the lead terminals13are formed, the side surfaces3cof the image sensor3, the side surfaces on the outer side of the support part6, and the peripheral part of the rear surface4band the side surfaces4cof the glass4, in a state where parts of the bonding wires7extending outward from the support part6are embedded.

The sealing resin part5is formed in a frame shape along the rectangular outer shape of the substrate2in plan view and has four side parts5aalong the respective sides of the rectangular outer shape of the substrate2as depicted inFIG.2. In addition, as depicted inFIG.1, the sealing resin part5has side surface parts5ccontinuous with the side surfaces2cof the substrate2in such a manner as to be flush with the side surfaces2cof the substrate2.

The sealing resin part5is formed by curing a resin material around the image sensor3on the substrate2and the glass4in a configuration in which the image sensor3is mounted on the substrate2, these are connected to each other by the bonding wires7, and the glass4is mounted on the image sensor3through the support part6. The sealing resin part5is formed into a predetermined shape by injection molding using, for example, a molding mold. However, the sealing resin part5may be a part formed by a potting process using, for example, a dispenser. In this case, the resin material serving as the sealing resin part5is applied to a predetermined region while being discharged from the nozzle of the dispenser, and then cured to form the sealing resin part5.

The material of the sealing resin part5is, for example, a thermosetting resin containing silicon oxide as a main component or a filler such as alumina. As the resin material for forming the sealing resin part5, for example, a thermosetting resin such as a phenolic resin, a silicon-based resin, an acrylic resin, an epoxy resin, a urethane resin, a silicon resin, or a polyetheramide resin, a thermoplastic resin such as polyamide-imide, polypropylene, or liquid crystal polymer, a photosensitive resin such as a UV curable resin that is an acrylic resin, rubber, and other known resin materials are used singly or in combination. In addition, the sealing resin part5may be a part formed including a resin material in a liquid state at normal temperature by compression molding or the like. It should be noted that the sealing resin part5has an insulating property.

In the present embodiment, the sealing resin part5is formed including a material having a light shielding property. Specifically, as a material of the sealing resin part5, a black resin material containing a black pigment such as carbon black or titanium black is used. Accordingly, the sealing resin part5becomes a black part, and the sealing resin part5can function as a light shielding part.

As described above, the sealing resin part5provided at the peripheral part on the substrate2in the imaging device1has a protrusion part20. The protrusion part20is formed as a part of the sealing resin part5by, for example, injection molding, and an upper surface21is positioned above the front surface4aof the glass4in the vertical direction that is the plate thickness direction of the substrate2. That is, the protrusion part20is a part in the sealing resin part5protruding upward from the front surface4aof the glass4.

The upper surface21of the protrusion part20is a surface perpendicular to the vertical direction. The protrusion part20is positioned on a common horizontal virtual plane Al. The protrusion part20has a constant or substantially constant protrusion height h1from the front surface4aof the glass4.

The protrusion part20is formed so as to surround the whole circumference of the glass4along the plan view outer shape of the sealing resin part5. Thus, the protrusion part20has four side parts20aalong the rectangular outer shape of the glass4in plan view and is formed in a frame shape in plan view by these side parts20a(seeFIG.2). The four side parts20aare linear parts along the sides of the glass4, and the width w1is made constant or substantially constant as a whole. Each side part20aof the protrusion part20serves as an upper surface layer part of each side part5ain the sealing resin part5.

The protrusion part20is formed at a position slightly outside the four side surfaces4cof the glass4. Thus, the protrusion part20has an inner peripheral-side upper surface part22that is continuous with the front surface4aof the glass4in such a manner as to be flush therewith and an inner surface part23that is an opposite surface of each of the four side surface parts5cin the sealing resin part5. However, it is not necessary to form the inner peripheral-side upper surface part22.

Regarding the dimension of the protrusion part20, the protrusion height h1, which is the dimension between the front surface4aof the glass4and the upper surface21of the protrusion part20, in the vertical direction is, for example, 10 to 200 μm. It should be noted that the thickness of the glass4is approximately 400 μm to 500 μm, as an example.

In addition, regarding the dimension of the protrusion part20, the width w1of each side part20aof the protrusion part20is, for example, 100 μm or more. Thus, the width w1of the side part20ais, for example, a value within the range of 100 to 150 μm, a value within the range of 100 to 200 μm, a value within the range of 100 to 250 μm, or a value within the range of 100 to 300 μm. It should be noted that, as the chip size of the imaging device1, one side of the square has, for example, 6 to 10 mm.

<2. Manufacturing Method of Imaging Device According to First Embodiment>

An example of a manufacturing method of the imaging device1according to the first embodiment of the present technique will be described with reference toFIG.3toFIG.7.

In the manufacturing method of the imaging device1, first, a step of preparing the substrate2is performed. The substrate2is obtained, for example, by dicing and singulating a substrate member in which a plurality of substrate parts serving as the substrate2in the imaging device1is two-dimensionally connected. The plurality of lead terminals13is formed on the front surface2aof the substrate2.

In addition, a step of preparing the image sensor3as an imaging element mounted on the substrate2is performed. On the front surface3aof the image sensor3, the plurality of electrode pads14is formed through plating or the like.

In addition, a step of preparing the glass4as a transparent member mounted on the image sensor3is performed. The glass4is obtained, for example, by cutting a glass plate having a predetermined shape into a rectangular shape by dicing.

Subsequently, an assembly step is performed. In the assembly step, as depicted inFIG.3A, a step of mounting the image sensor3on the substrate2is first performed. That is, die bonding of the image sensor3to the substrate2is performed. In this step, as depicted inFIG.3A, the image sensor3is bonded to a predetermined mounting region on the front surface2aof the substrate2by a die bond material such as an insulating or conductive resin paste that serves as the joint layer9.

Next, as depicted inFIG.3A, a step of providing the bonding wires7for electrically connecting the substrate2and the image sensor3to each other is performed. Here, wire bonding is performed in which the lead terminals13of the substrate2and the electrode pads14of the image sensor3are electrically connected to each other by the bonding wires7.

Next, a step of providing the glass4on the image sensor3through the support part6is performed. Specifically, first, as depicted inFIG.3B, a rib resin31, which is a resin material serving as the support part6, is applied to a predetermined region on the front surface3aof the image sensor3by a dispenser or the like in a rectangular frame shape along the outer shape of the image sensor3in plan view. However, the rib resin31may be formed by patterning through photolithography or the like.

Next, as depicted inFIG.3C, a step of mounting the glass4is performed. The glass4is mounted on the image sensor3so as to close an opening on the upper side of the rib resin31. Thereafter, a step of curing the rib resin31on the front surface3aof the image sensor3is performed. In a case where the rib resin31has a thermosetting property, a heating step (cure) for curing the rib resin31is performed in a state where the glass4is mounted on the image sensor3through the rib resin31. When the rib resin31is cured, the glass4is fixed on the image sensor3through the support part6formed by the rib resin31, and the cavity8as a sealed space is formed.

Subsequently, as depicted inFIG.4A, a step of pasting a protective sheet40as a protective material to the front surface4aof the glass4is performed. The protective sheet40has substantially the same shape and dimensions as the front surface4aof the glass4and is pasted so as to cover the whole front surface4aof the glass4.

As the protective sheet40, for example, a sheet having adhesiveness and heat resistance such that the covering state of the front surface4afor the glass4can be maintained in injection molding for forming the sealing resin part5is used. In addition, as the protective sheet40, a sheet having a thickness equal to the dimension of the protrusion height h1(seeFIG.1) of the protrusion part20in the sealing resin part5of the imaging device1or a thickness larger than the dimension of the protrusion height h1is used. As described above, in the present embodiment, the protective sheet40that is a film-like member that wholly covers the front surface4aof the glass4is used as a protective material.

An example of the structure of the protective sheet40will be described. As depicted inFIG.6, the protective sheet40has a base material41formed by a predetermined material and an adhesive layer42including an adhesive material for pasting the base material41to the glass4. That is, the material configuration of the protective sheet40is a two-layer structure including the base material41and the adhesive layer42. Regarding the thickness of each layer of the protective sheet40, the layer thickness T1of the base material41is thicker than the layer thickness T2of the adhesive layer42. However, the size relation between the layer thicknesses of the base material41and the adhesive layer42is not limited.

A predetermined material for forming the base material41is, for example, an organic-based film material. Specifically, for example, PET (polyethylene terephthalate) is used as a material of the base material41. As a material of the adhesive layer42, a material that can adhere to the base material41and can easily clean, even in a case where a glue residue (residue of an adhesive) occurs on the glass4as an adherend, the residue with an organic solvent or the like is used. Specifically, for example, an acrylic resin adhesive is used as a material of the adhesive layer42.

In the present embodiment, the base material41is assumed to be formed by PET, and the adhesive layer42is assumed to be formed by an acrylic resin adhesive. However, the layer structure of the protective sheet40and the material of each layer are not limited. For example, in a case where the material of the adhesive layer42is a thermosetting resin, a step of curing the adhesive layer42is performed to fix the protective sheet40to the front surface4aof the glass4. In addition, the protective sheet40may have a single layer or a laminated structure of three or more layers.

As described above, the steps including the step of providing the glass4on the image sensor3and the step of pasting the protective sheet40to the front surface4aof the glass4are the step of providing, on the image sensor3through the support part6, the glass4with the front surface4acovered with the protective sheet40.

It should be noted that a method of mounting, on the image sensor3, the glass4with the protective sheet40pasted to the front surface4ain advance may be used. In this case, in the step of preparing the glass4, the glass4with the protective sheet40is prepared. For example, the glass4with the protective sheet40is obtained in such a manner that the protective sheet is wholly pasted to the front surface of a glass plate in a wafer state before being singulated into the glass4in a chip state and the glass plate is then singulated together with the protective sheet. Here, as the protective sheet to be pasted to the front surface of the glass plate in a wafer state, the two-layer structure of the base material41formed by PET and the adhesive layer42of an acrylic resin adhesive as described above, or, for example, a DAF material (DAF: die attach film) used for bonding a semiconductor chip to a substrate, or the like can be used.

In a case where the glass4with the protective sheet40is used, the step of providing, on the image sensor3through the support part6, the glass4with the front surface4acovered with the protective sheet40is as follows. That is, after the rib resin31is applied onto the front surface3aof the image sensor3as depicted inFIG.3B, the glass4with the protective sheet40is mounted as depicted inFIG.4A, and a curing step for curing the rib resin31is performed. By using the glass4with the protective sheet40, the step of pasting the protective sheet40to the glass4provided on the image sensor3is omitted.

As depicted inFIG.4A, after the configuration in which the glass4with the front surface4acovered with the protective sheet40is provided on the image sensor3is obtained, a step of forming the sealing resin part5around the image sensor3on the substrate2and the glass4is performed by use of a mold50for molding the molding resin part.

As depicted inFIG.4B, the mold50has an upper mold51that is a first mold, and a lower mold52that is a second mold for forming a cavity53which is a molding space together with the upper mold51. The upper mold51has a flat molding surface51afor forming the upper side of the sealing resin part5. The lower mold52has a flat support surface52a, as a surface for supporting the substrate2, facing the molding surface51aof the upper mold51in a parallel manner.

The mold50is a transfer mold and has a pot (not depicted) in which a tablet that is a solid resin of a molding material is set, and a plunger (not depicted) driven in the pot. The space in the pot communicates with the cavity53through a gate or the like serving as a passage for the resin material.

The molding surface51aof the upper mold51is wholly covered with a film55formed by an elastic or plastic material. The film55is what is generally called a release film, and is, for example, automatically supplied from a supply device attached to the mold50and comes into close contact with the molding surface51aof the upper mold51by vacuum suction or the like. For example, the film55is peeled off from the molding surface of the upper mold51each time the mold50is opened and the molded article is taken out, and is supplied for each shot of injection molding. According to the film55, a resin material5X forming the sealing resin part5is prevented from adhering to the molding surface51aof the upper mold51. The thickness of the film55is, for example, approximately 200 μm.

A workpiece subjected to the formation of the sealing resin part5is set to such a mold50. It should be noted that the workpiece has the configuration depicted inFIG.4A. As depicted inFIG.4B, the workpiece is set in a state where it is placed at a predetermined position on the support surface52aof the lower mold52in a direction in which the protective sheet40side is the upper mold51side and the substrate2side is the lower mold52side.

After the workpiece is set to the mold50, the mold50becomes a mold closed state (mold clamped state), so that the cavity53is formed. In the mold closed state of the mold50, the workpiece becomes a clamped state in which it is vertically sandwiched between the lower mold52and the upper mold51. In the mold closed state of the mold50, the film55is pressed against the protective sheet40on the glass4, and the protective sheet40comes into close contact with the film55. That is, the protective sheet40is pressed against the molding surface51aof the upper mold51from an upper surface40aside through the film55. Accordingly, the protective sheet40is compressed in the thickness direction according to the thickness thereof and slightly expanded in the surface direction.

As depicted inFIG.4C, after the end of the mold closed step, the tablet in the pot is melted and pumped in a predetermined passage as the resin material5X and injected and filled into the cavity53. In the step of injection molding, a black resin material having a light shielding property is used as the resin material5X by containing, for example, a black pigment such as carbon black or titanium black. However, the resin material5X is not limited to the material having a light shielding property.

When the filling of the resin material5X into the cavity53is completed, the resin material5X is cured by performing a predetermined process such as heating or cooling the resin material5X. Accordingly, a resin part serving as the sealing resin part5is formed. Thereafter, the clamp by the mold50is released, the mold50is opened, and the workpiece subjected to injection molding is taken out.

As depicted inFIG.5A, in the workpiece taken out from the mold50, the protective sheet40remains on the glass4. Here, for example, the upper surface40aof the protective sheet40is flush with the upper surface21of the sealing resin part5by the molding surface51aof the upper mold51in a horizontal state. However, depending on the thickness, the material, and the like of the protective sheet40, the thickness of the protective sheet40may become thicker than that in the clamped state due to the return of the protective sheet40from the compressed state caused by the release of the clamp by the mold50, or the protective sheet40may be deformed from the wholly pasted state to the front surface4aof the glass4.

As depicted inFIG.5B, after the step of forming the sealing resin part5, a step of removing the protective sheet40is performed. In this step, the protective sheet40on the glass4is peeled off by being picked up, for example, by a suction collet or the like. In addition, in a case where the residue of the adhesive layer42is present on the front surface4aof the glass4in a state where the protective sheet40is peeled off, the residue is cleaned by use of, for example, an organic solvent.

By removing the protective sheet40, the front surface4aof the glass4whose periphery is surrounded by the sealing resin part5is exposed. Then, in the sealing resin part5, the part surrounding the periphery of the protective sheet40serves as the protrusion part20. That is, the horizontal molding surface51ais filled with the resin material5X above the front surface4aof the glass4by the thickness of the protective sheet40, and the part above the front surface4aof the glass4serves as the protrusion part20in the sealing resin part5. Thus, the protrusion height h1(seeFIG.1) of the protrusion part20has the same or substantially the same dimension as the thickness of the protective sheet40.

In a state where the protective sheet40is removed, the glass4and the sealing resin part5form a recess part having the front surface4aof the glass4and the inner peripheral-side upper surface part22as a bottom surface part and the four inner surface parts23as side surfaces. In the injection molding, the peripheral part of the lower surface40bof the protective sheet40serves as a surface forming the inner peripheral-side upper surface part22, and the side surfaces40cof the protective sheet40serve as surfaces forming the inner surface parts23.

Then, as depicted inFIG.5C, a step of providing the plurality of solder balls15on the rear surface2bside of the substrate2is performed. Here, a step of ball mounting and reflow is performed in which solder is arranged and fixed to each of the plurality of terminal electrodes arranged and formed in a lattice point shape on the rear surface2bside of the substrate2.

By the manufacturing process as described above, the imaging device1as depicted inFIG.1andFIG.2can be obtained. It should be noted that, in the step of injection molding, the workpiece set in the mold may be one singulated into a chip-like piece corresponding to the imaging device1, or a plurality of package structures including the image sensor3and the glass4may be provided on an integrated substrate sheet formed in the assembled state of the substrates2. In a case where the workpiece set in the mold has a configuration using a substrate sheet, a dicing step is performed in which the workpiece taken out from the mold after the step of injection molding is cut and singulated for each predetermined region corresponding to the imaging device1.

In the manufacturing method of the imaging device1as described above, a sheet having the following configuration is used as the protective sheet40pasted to the glass4. As depicted inFIG.7, the protective sheet40has a substantially rectangular plan view outer shape corresponding to the front surface4aof the glass4and has recess parts46formed on four side parts45in the outer shape in plan view, and R-shaped parts48formed at four corner parts47.

The recess part46is a curved recess part with respect to a rectangular virtual outer shape V1corresponding to the outer shape of the glass4in plan view. The recess part46is formed in the middle part excluding both ends in each side part45of the protective sheet40. The recess part46is formed so as to form, for example, an arc shape.

The protective sheet40has a shape constricted by the recess parts46on four sides facing each other in the longitudinal direction (the lateral direction inFIG.7) and the short-length direction (the vertical direction inFIG.7). That is, in the regions where the recess parts46are formed, the width gradually narrows from both ends to the central part in each direction of the longitudinal direction and the short-length direction of the protective sheet40. It should be noted that the protective sheet40has a symmetrical or substantially symmetrical shape in each direction of the longitudinal direction and the short-length direction.

The protective sheet40is formed such that a recess amount D1of the recess part46with respect to a virtual straight line V1athat is each side of the virtual outer shape V1has a predetermined dimension. The recess amount D1is a distance between each virtual straight line V1aand a vertex P1positioned in the center of the recess part46in each direction of the longitudinal direction and the short-length direction of the protective sheet40.

The recess amount D1of the recess part46can be determined on the basis of, for example, the layer thickness T2(seeFIG.6) of the adhesive layer42of the protective sheet40. Specifically, the recess amount D1of the recess part46with respect to the virtual straight line V1aalong the rectangular shape in the outer shape of the protective sheet40in plan view is set as a dimension 0.7 to 1.3 times the layer thickness T2of the adhesive layer42. However, the magnitude of the recess amount D1of the recess part46is not limited to values within the numerical range described above.

In addition, the recess amounts D1on the long side and the short side of the protective sheet40may be different from each other. Specifically, for example, the recess amount D1of the recess part46(46B) on the short side of the protective sheet40may be set longer than the recess amount D1of the recess part46(46A) on the long side. In addition, the shape of the recess part46is not limited to an arc shape, and is only required to be a shape in which the protective sheet40is constricted in the longitudinal direction and the short-length direction as a pair of recess parts46of the protective sheet40facing each other in the longitudinal direction or the short-length direction.

The R-shaped part48is a rounded shape part formed to have an arc-shaped curve with respect to the right-angled corner part in the virtual outer shape V1. The protective sheet40is formed such that a curvature radius R1of the arc formed by the R-shaped part48becomes a predetermined value.

The curvature radius R1of the R-shaped part48is set to a value of, for example, approximately 0.2 mm. However, the magnitude of the curvature radius R1is not particularly limited. In addition, the curvature radiuses R1of the four corner parts47in the protective sheet40may be different in magnitude for each corner part47.

In the present embodiment, the protective sheet40has the recess parts46and the R-shaped parts48, and the protective sheet40may be only required to have at least any one of the recess parts46and the R-shaped parts48. In addition, the recess parts46may be formed only on a part of the side parts45among the four side parts45of the protective sheet40, such as, for example, being formed only on a set of side parts45facing each other in the protective sheet40. In addition, the R-shaped parts48may be formed only at a part of the corner parts47among the four corner parts47of the protective sheet40.

According to the imaging device1and the manufacturing method thereof according to the present embodiment as described above, it is possible to suppress the occurrence of scratches and stains on the glass4provided so as to cover the image sensor3from the front surface3aside and to stabilize the manufacturing yield. Since the imaging device1has the protrusion part20in the sealing resin part5, the protrusion part20can be a part subjected to the suction action by the collet when being picked up by the collet, so that it is possible to suppress the occurrence of scratches and stains on the glass4by the collet.

For example, as depicted inFIG.8A, in the configuration of a comparative example in which the protrusion part20is not formed in the sealing resin part5, the front surface4aof the glass4becomes the uppermost surface in the package structure. In the package of the comparative example, an upper surface5sof the sealing resin part5becomes a surface having substantially the same height as the front surface4aof the glass4or lower than the front surface4aof the glass4. In particular, in a case where the protective sheet40is not used in the injection molding as described above, the glass4slightly bites into the film55, so that the upper surface5sof the sealing resin part5becomes a surface lower than the front surface4aof the glass4.

Therefore, as depicted inFIG.8A, the package of the comparative example is subjected to the suction action by a collet60on the front surface4aof the glass4when being picked up by the collet60. The collet60is what is generally called a flat collet and has a rectangular plate-like holding part61for sucking and holding an object to be picked up, and a columnar support part62for attaching the collet60to the main body side of the pickup device. The holding part61has a suction surface61aalong a plane and brings the suction surface61ainto contact with the suction object. An intake passage formed in communication from the support part62to the holding part61faces and opens in the suction surface61a. On the suction surface61a, the suction action by a suction device provided on the main body side of the device is obtained by the intake passage.

As depicted inFIG.8A, since the package of the comparative example is subjected to the suction action of the flat collet60on the front surface4aof the glass4, the suction surface61aof the collet60interferes with the glass4, especially the corner parts on the front surface4aside (see the parts indicated by the symbol C1), and there is a risk that the glass4is scratched or that the stains of the collet60adhere to the glass4to contaminate the glass4. The occurrence of scratches and contamination in the glass4causes a decrease in the manufacturing yield.

Therefore, as depicted inFIG.8B, according to the imaging device1of the embodiment, since the sealing resin part5has the protrusion part20with the upper surface21positioned above the front surface4aof the glass4, the upper surface21of the sealing resin part5becomes the uppermost surface in the imaging device1. Therefore, when being picked up by the collet60, the imaging device1is subjected to the suction action by the collet60by contact of the suction surface61awith the upper surface21of the sealing resin part5.

Thus, it is possible to prevent the suction surface61aof the collet60from interfering with the glass4. Accordingly, it is possible to suppress scratching of the glass4caused by interference of the collet60and contamination of the glass4by stains of the collet60adhering to the glass4, and as a result, the manufacturing yield can be stabilized or improved.

In addition, according to the imaging device1, a flat collet such as the collet60depicted inFIG.8Bcan be used. Accordingly, it is not necessary to use a dedicated collet according to the size or the like of the glass4as a collet for picking up the imaging device1, and an increase in cost can be avoided.

Regarding the dimension of the protrusion part20of the sealing resin part5, the dimension of the protrusion height h1(seeFIG.1) is preferably within the range of 10 to 200 μm for the following reasons. That is, if the protrusion height h1of the protrusion part20is less than 10 μm, the height of the upper surface21of the sealing resin part5with respect to the front surface4aof the glass4becomes insufficient, and it becomes difficult to prevent the collet60from interfering with the glass4.

In addition, if the protrusion height h1of the protrusion part20exceeds 200 μm, the shrinkage stress of the sealing resin part5increases, and the shrinkage stress may cause an adverse effect on other configurations configuring the imaging device1. In addition, if the protrusion height h1of the protrusion part20exceeds 200 μm, the amount of the resin material forming the sealing resin part5increases, and thus there is a problem of increasing the cost.

In addition, if the protrusion height h1of the protrusion part20exceeds 200 μm, the protrusion part20existing around the glass4becomes high, and thus, the incident light to the glass4easily hits the protrusion part20. In a case where the incident light hits the inner surface part23of the protrusion part20, the reflected light from the inner surface part23enters the image sensor3, and thus, there is a possibility that the flare is generated or deteriorated. In addition, if the protrusion part20becomes high, there is a possibility of causing a problem that the incident light to the image sensor3is blocked by the protrusion part20.

In addition, regarding the dimension of the protrusion part20of the sealing resin part5, the width w1(seeFIG.1) of each side part20aof the protrusion part20is preferably 100 μm or more for the following reasons. That is, by securing 100 μm or more for the width w1of each side part20aof the protrusion part20, it is possible to secure a sufficient area for the upper surface21of the sealing resin part5with which the suction surface61aof the collet60is brought into contact. Accordingly, the suction action by the collet60can be sufficiently obtained, and the suction of the imaging device1by the collet60can be facilitated, so that an excellent pickup property for the imaging device1can be obtained.

In addition, the manufacturing method of the imaging device according to the present embodiment includes the step of providing, on the upper side of the image sensor3, the glass4with the front surface4acovered with the protective sheet40in the step of injection molding for forming the sealing resin part5. That is, the manufacturing method according to the present embodiment uses the protective sheet40covering the front surface4aof the glass4to form the protrusion part20in the sealing resin part5.

According to such a manufacturing method, by using the protective sheet40, it is not necessary to form the mold in a complicated shape in order to form the protrusion part20in the sealing resin part5, and the protrusion part20can be formed by using the existing mold having the flat molding surface51a. Accordingly, the manufacturing cost of the imaging device1can be suppressed.

In addition, by using the protective sheet40, it is possible to suppress the occurrence of stains and scratches on the front surface4aof the glass4by injection molding for forming the sealing resin part5. Accordingly, it is possible to stabilize the manufacturing yield. In addition, by using the protective sheet40, the resin material can be dammed by the protective sheet40in injection molding, and it is possible to suppress the occurrence of burrs due to riding of the resin material on the front surface4aof the glass4. That is, it is possible to suppress the occurrence of burrs and bleeds caused by the infiltration of the resin material between the front surface4aof the glass4and the film55on the upper mold51side due to variations in the flatness of the glass4or the like in a case where the protective sheet40is not used. In addition, by using the protective sheet40that is peeled off and removed in the manufacturing process, even in a case where burrs or the like occur on the protective sheet40, it is possible to remove the burrs or the like together with the protective sheet40at the same time when the protective sheet40is peeled off. In addition, by using the protective sheet40, damage to the glass4or the like caused by the clamping pressure of the mold50can be avoided. Thus, the manufacturing yield can be stabilized even by enabling suppression of the occurrence of burrs and the like and avoidance of damage to the glass4or the like as described above.

In addition, the manufacturing method of the imaging device according to the present embodiment includes the step of removing the protective sheet40after the step of injection molding for forming the sealing resin part5using the protective sheet40as a film-like member. According to such a manufacturing method, the front surface4aof the glass4can be maintained in a clean state, and the performance of the imaging device1can be secured.

In addition, the manufacturing method of the imaging device according to the present embodiment uses the protective sheet40having the recess parts46formed on the four side parts45and the R-shaped parts48formed at the four corners. According to such a manufacturing method, for the protective sheet40that is compressed in the thickness direction by clamping the workpiece to the mold50and becomes a collapsed state, the shape of the mold50after deformation by clamping can be approximated to a rectangular shape corresponding to the shape of the glass4in plan view.

Specifically, as depicted inFIG.7, regarding the planar deformation of the protective sheet40by clamping the workpiece to the mold50, the four side parts45are deformed so as to swell outward (see the arrows F1), and the corner parts47are deformed so as to project outward at the four corners (see the arrows F2). In these deformations, for example, in a case where the protective sheet40has the virtual outer shape V1, a part of the protective sheet40is deformed to protrude outward with respect to the virtual outer shape V1.

Therefore, according to the protective sheet40having the shape in plan view as depicted inFIG.7, for the deformation caused by the clamping of the mold50, the deformation caused on the side parts45is offset by the recess parts46, and the side parts45are approximated to the shape along the virtual straight line V1a. In addition, the deformation generated at the corner parts47is offset by the R-shaped parts48, and the corner parts47are approximated to the shapes along the right-angled corner parts of the virtual outer shape V1. Thus, by providing the recess parts46and the R-shaped parts48in the protective sheet40, the shape of the protective sheet40at the time of injection molding, that is, in the clamped state by the mold50can be approximated to a rectangular shape. Accordingly, the formation area of the sealing resin part5can easily be controlled.

In addition, the recess amount D1of the recess part46is preferably within the range of 0.7 to 1.3 times the layer thickness T2of the adhesive layer42. Accordingly, the shape of the protective sheet40in the deformed state by clamping of the mold50can effectively be approximated to a rectangular shape (virtual outer shape V1). In addition, by allowing the curvature radius R1of the R-shaped part48to be approximately 0.2 mm, the shape of the protective sheet40in the deformed state can effectively be approximated to a rectangular shape.

In addition, the manufacturing method of the imaging device according to the present embodiment uses a two-layer structure of the base material41and the adhesive layer42as the protective sheet40. According to such a manufacturing method, the protective sheet40can have a simple and inexpensive configuration.

In particular, as a preferred configuration of the protective sheet40, a configuration in which the material of the base material41is PET and the material of the adhesive layer42is an acrylic resin adhesive is employed. Accordingly, it is possible to obtain excellent adhesion of the adhesive layer42to the base material41, and to easily and safely clean the adhesive layer42remaining on the front surface4aof the glass4after peeling off the protective sheet40by using an organic solvent. That is, it is possible to obtain excellent adhesiveness and removability of the protective sheet40to the front surface4aof the glass4.

<3. Configuration Example of Imaging Device According to Second Embodiment>

A configuration example of an imaging device71according to a second embodiment of the present technique will be described with reference toFIG.9andFIG.10. In each embodiment described below, the same reference signs are given to the common configurations as in the first embodiment, and description of the duplicate contents is appropriately omitted.

As depicted inFIG.9andFIG.10, the imaging device71according to the present embodiment differs from the imaging device1according to the first embodiment in terms of the structure of the protrusion part20of the sealing resin part5. That is, in the imaging device71according to the present embodiment, the protrusion part20has a glass covering part25as a transparent member covering part that extends on the front surface4aof the glass4so as to cover an edge part of the front surface4aof the glass4.

The glass covering part25is a part of the protrusion part20that extends inward along the front surface4aof the glass4while maintaining the height of the upper surface21from the main body part of the protrusion part20. The dimension (thickness) of the glass covering part25in the vertical direction is constant or substantially constant as a whole.

The glass covering part25is formed over the whole circumference of the edge part of the front surface4aof the glass4along the outer shape of the glass4in plan view. Thus, the glass covering part25has four side parts25aalong the outer shape of the glass4in plan view and is formed in a frame shape in plan view by these side parts25a(seeFIG.10). The four side parts25aare linear parts along the sides of the glass4, and the width thereof is constant or substantially constant as a whole. The side parts25aof the glass covering part25are inner peripheral parts of the side parts20aof the protrusion part20. The glass covering part25forms the inner peripheral side of the upper surface21of the sealing resin part5by the upper surface thereof and has a lower surface25bthat is a contact surface with the front surface4aof the glass4and an end surface25con the inner peripheral side.

The glass covering part25is formed in a region outside the pixel region12so as not to overlap the pixel region12of the image sensor3in plan view. That is, the glass covering part25is formed such that the end surface25con the inner peripheral side is positioned outside the pixel region12.

<4. Manufacturing Method of Imaging Device According to Second Embodiment>

An example of a manufacturing method of the imaging device71according to the second embodiment will be described with reference toFIG.11.

In the manufacturing method of the imaging device71, as in the case of the first embodiment, die bonding and wire bonding are performed (seeFIG.3A), and the step of providing, on the image sensor3through the support part6, the glass4with the front surface4acovered with the protective sheet40is performed (seeFIG.3B,FIG.3C, andFIG.4A).

In the present embodiment, as depicted inFIG.11A, a sheet having an outer dimension a little smaller than that of the glass4is used as the protective sheet40. That is, the protective sheet40partially covers the front surface4aof the glass4except a peripheral edge part of the front surface4a. A part of the front surface4aof the glass4that is not covered with the protective sheet40, that is, an exposed part4dof a peripheral edge of the front surface4aserves as a formation region of the glass covering part25. It should be noted that the magnitude of the protective sheet40is set in consideration of an increase (spread) in the area of the protective sheet40due to compression by clamping of the mold50.

Next, as depicted inFIG.11B, as in the case of the first embodiment, the step of forming the sealing resin part5is performed by injection molding with use of the mold50. Here, the resin material5X enters between the film55on the upper mold51side and the exposed part4dof the front surface4aof the glass4around the protective sheet40to form the glass covering part25.

After the step of forming the sealing resin part5, a step of removing the protective sheet40is performed as depicted inFIG.11C. Thereafter, the step of providing a plurality of solder balls15on the rear surface2bside of the substrate2is performed (seeFIG.5C). By the manufacturing steps described above, as depicted inFIG.9andFIG.10, the imaging device71including the sealing resin part5having the glass covering part25in the protrusion part20is obtained.

According to the imaging device71of the second embodiment, in addition to the effect obtained by the first embodiment, the following effect can be obtained. That is, with a configuration in which the protrusion part20of the sealing resin part5has the glass covering part25covering the glass4, the sealing resin part5can have a function as a light shielding film for cutting unnecessary light.

Thus, in the configuration having the glass covering part25, the sealing resin part5is preferably formed by a material having a light shielding property such as a black resin material containing a black pigment. By allowing the sealing resin part5to have a function as a light shielding film by the glass covering part25, a light shielding function can be obtained in the glass4without using, for example, a glass with a relatively expensive light shielding film. Accordingly, the member cost can be suppressed.

<5. Configuration Example of Imaging Device According to Third Embodiment>

A configuration example of an imaging device81according to a third embodiment of the present technique will be described with reference toFIG.12andFIG.13.

As depicted inFIG.12andFIG.13, the imaging device81according to the present embodiment differs from the imaging device71according to the second embodiment in that a sealing resin receiving part82is provided on the front surface4aof the glass4at a region inside the sealing resin part5.

The sealing resin receiving part82is provided at the edge part on the front surface4aof the glass4and is in contact with the protrusion part20at an outer surface83that is an outer side surface. The sealing resin receiving part82is formed over the whole circumference of the edge part of the front surface4aof the glass4along the outer shape of the glass4in plan view. Thus, the sealing resin receiving part82has four side parts82aalong the outer shape of the glass4in plan view and is formed in a frame shape in plan view by these side parts82a(seeFIG.13). The four side parts82aare linear parts along the sides of the glass4, and the width thereof is constant or substantially constant as a whole. In addition, the dimension (thickness) of the sealing resin receiving part82in the vertical direction is constant or substantially constant as a whole.

The sealing resin receiving part82has, for example, a rectangular transverse cross-sectional shape at each side part82a. In a case where the transverse cross-sectional shape of each side part82ais rectangular, the sealing resin receiving part82has the outer surface83, an inner surface84that is a side surface on the opposite side (inner side) of the outer surface83, an upper surface85, and a lower surface86that a contact surface with the front surface4aof the glass4. The upper surface85of the sealing resin receiving part82is flush with the upper surface21of the sealing resin part5.

The sealing resin receiving part82is formed in a region outside the pixel region12so as not to overlap the pixel region12of the image sensor3in plan view. That is, the sealing resin receiving part82is formed such that the inner surface84is positioned outside the pixel region12.

In the examples depicted inFIG.12andFIG.13, the sealing resin receiving part82is formed at a region slightly inside an edge of the front surface4aof the glass4. Therefore, the glass covering part25of the protrusion part20is formed at an edge end part of the front surface4aof the glass4. That is, the sealing resin receiving part82is surrounded by the glass covering part25. The sealing resin receiving part82is in contact with the inner end surface25cof the glass covering part25on the outer surface83.

The material for forming the sealing resin receiving part82is not particularly limited, and is, for example, a photosensitive adhesive such as a UV (ultraviolet) curable resin that is an acrylic resin, a thermosetting resin such as an epoxy resin, or a mixture thereof. In addition, the material for forming the sealing resin receiving part82is preferably a material having a light shielding property such as a black resin material containing a black pigment such as carbon black. The sealing resin receiving part82is formed on the front surface4aof the glass4by coating with a dispenser, patterning through photolithography, or the like.

In addition, the sealing resin receiving part82may be formed by pasting the protective sheet40used in the first embodiment and the like to the front surface4aof the glass4as a frame shape. It should be noted that the sealing resin receiving part82is not limited to those including resin, and may be provided by pasting, for example, a structure including ceramics such as glass or an inorganic material such as metal or silicon to the glass4with an adhesive or the like.

<6. Manufacturing Method of Imaging Device According to Third Embodiment>

An example of a manufacturing method of the imaging device81according to the third embodiment will be described with reference toFIG.14.

In the manufacturing method of the imaging device81, as in the case of the first embodiment, die bonding and wire bonding are performed (seeFIG.3A), and the step of providing the glass4on the image sensor3through the support part6is performed (seeFIG.3BandFIG.3C).

Thereafter, as depicted inFIG.14A, a step of forming the sealing resin receiving part82as a protective material on the front surface4aof the glass4is performed. In this step, a rib resin82X, which is a resin material serving as the sealing resin receiving part82, is applied to a predetermined region on the front surface4aof the glass4by a dispenser or the like in a rectangular frame shape along the outer shape of the glass4in plan view. However, the rib resin82X may be formed by patterning through photolithography, or the like.

Next, a step of curing the rib resin82X on the front surface4aof the glass4is performed. In a case where the rib resin82X has thermosetting property, a heating step (cure) for curing the rib resin82X is performed in a state where the rib resin82X is applied to the front surface4aof the glass4. When the rib resin82X is cured, the sealing resin receiving part82is formed on the glass4by the rib resin82X.

The sealing resin receiving part82is formed at a region slightly inside the edge of the front surface4aof the glass4. Therefore, the exposed part4dis present on the front surface4aof the glass4outside the sealing resin receiving part82, and the exposed part4dserves as a formation region of the glass covering part25. However, the sealing resin receiving part82may be provided at the edge of the front surface4aof the glass4such that the exposed part4dof the front surface4aof the glass4is not present outside the sealing resin receiving part82. In addition, a portion on the front surface4aof the glass4inside the sealing resin receiving part82is exposed.

As the sealing resin receiving part82, for example, a sheet having heat resistance such that the fixing state to the front surface4aof the glass4can be maintained in injection molding for forming the sealing resin part5is used. In addition, as the sealing resin receiving part82, a sheet having a thickness equal to the dimension of the protrusion height h1(seeFIG.1) of the protrusion part20in the sealing resin part5of the imaging device81or a thickness larger than the dimension of the protrusion height h1is used. As described above, in the present embodiment, the sealing resin receiving part82covering the peripheral edge part of the front surface4aof the glass4is used as a protective material.

As described above, the steps including the step of providing the glass4on the image sensor3and the step of providing the sealing resin receiving part82on the front surface4aof the glass4are the step of providing, on the image sensor3through the support part6, the glass4with the peripheral edge part of the front surface4acovered with the sealing resin receiving part82.

It should be noted that a method of mounting, on the image sensor3, the glass4with the sealing resin receiving part82provided on the front surface4ain advance may be used. In this case, in the step of preparing the glass4, the glass4with the sealing resin receiving part82is prepared. For example, the glass4with the sealing resin receiving part82is obtained in such a manner that, on the front surface of a glass plate in a wafer state before being singulated into chip-shaped glasses, the sealing resin receiving part82is provided for each region corresponding to each glass4and the glass plate is then singulated.

In a case where the glass4with the sealing resin receiving part82is used, the step of providing, on the image sensor3through the support part6, the glass4with the peripheral edge part of the front surface4acovered with the sealing resin receiving part82is as follows. That is, after the rib resin31is applied onto the front surface3aof the image sensor3(seeFIG.3B), the glass4with the sealing resin receiving part82is mounted as depicted inFIG.11A, and a curing step for curing the rib resin31is performed. By using the glass4with the sealing resin receiving part82, the step of providing the sealing resin receiving part82on the glass4provided on the image sensor3is omitted.

Next, as depicted inFIG.14B, as in the case of the first embodiment, the step of forming the sealing resin part5is performed by injection molding with use of the mold50. Here, in a case where the sealing resin receiving part82has elasticity or plasticity, the sealing resin receiving part82is compressed by clamping the workpiece by use of the mold50. In injection molding, the resin material5X enters between the film55on the upper mold51side and the exposed part4dof the front surface4aof the glass4around the sealing resin receiving part82to form the glass covering part25.

After the step of forming the sealing resin part5is performed, the workpiece taken out from the mold50has a configuration having the sealing resin part5including the protrusion part20and the sealing resin receiving part82as depicted inFIG.14C. Thereafter, the step of providing a plurality of solder balls15on the rear surface2bside of the substrate2is performed (seeFIG.5C). By the manufacturing steps described above, as depicted inFIG.12and FIG.13, the imaging device81including the sealing resin part5having the glass covering part25in the protrusion part20and the sealing resin receiving part82is obtained. It should be noted that, in a case where the sealing resin receiving part82is provided at the edge of the front surface4aof the glass4, the glass covering part25is not formed in the protrusion part20.

According to the imaging device81of the third embodiment and the manufacturing method thereof, in addition to the effects obtained by the first embodiment and the second embodiment, the following effect can be obtained. That is, by using the sealing resin receiving part82as a protective material provided on the front surface4aof the glass4in order to form the protrusion part20, the step of removing the protective material after forming the sealing resin part5can be omitted. Accordingly, the steps can be simplified.

In addition, with the configuration having the sealing resin receiving part82, the sealing resin receiving part82can have a function as a light shielding film for cutting unnecessary light. Thus, the sealing resin receiving part82is preferably formed by a material having a light shielding property such as a black resin material containing a black pigment. By allowing the sealing resin receiving part82to have a function as a light shielding film, a light shielding function can be obtained in the glass4without using, for example, a glass with a relatively expensive light shielding film. Accordingly, the member cost can be suppressed.

<7. Manufacturing Method of Imaging Device According to Fourth Embodiment>

A fourth embodiment of the present technique will be described with reference toFIG.15andFIG.16. The present embodiment is an embodiment for a manufacturing method of an imaging device and will be described by taking the imaging device1of the first embodiment as an example.

In the manufacturing method of the imaging device1of the present embodiment, in the step of forming the sealing resin part5, a liquid resin5Y that is a resin material in a liquid state at normal temperature is used as a resin material for forming the sealing resin part5. As the liquid resin5Y, for example, a resin such as a UV (ultraviolet) curable resin or a thermosetting resin that can be cured by post-treatment is used.

As depicted inFIG.15BandFIG.15C, in the manufacturing method according to the present embodiment, a mold90used for forming the sealing resin part5is what is generally called a compression molding mold and has an upper mold91that is a first mold, and a lower mold92that is a second mold forming a cavity93which is a molding space, together with the upper mold91.

The upper mold91has a rectangular recess part91afor holding a workpiece97on the molding surface side. The recess part91ahas a shape and a dimension substantially the same as those of the substrate2in terms of the outer shape in plan view and has a depth substantially the same as the thickness of the substrate2. The workpiece97is held under suction by the upper mold91in a state where the substrate2is fitted into the recess part91a. In the upper mold91, an intake passage opened against the recess part91ais provided, and the suction action by a suction device, which is not depicted, is obtained. The periphery of the recess part91ais a flat mold alignment surface91bwith respect to the lower mold92.

The lower mold92has a rectangular recess part92aat a position opposite to the recess part91aof the upper mold91on the molding surface side. The recess part92ahas a shape and a dimension substantially the same as those of the recess part91aof the upper mold91in terms of the outer shape in plan view and has a depth substantially the same as the height of the sealing resin part5. The periphery of the recess part92ais a flat mold alignment surface92bwith respect to the upper mold91.

The recess part92aand the mold alignment surface92bof the lower mold92are wholly covered with a buffer sheet95formed by an elastic or plastic material. The buffer sheet95functions as a buffer member and a release film, is automatically supplied from, for example, a supply device attached to the mold90, and comes into close contact with the recess part92aand the mold alignment surface92bof the lower mold92by vacuum suction or the like. For example, the buffer sheet95is peeled off from the molding surface of the lower mold92each time the mold90is opened and the molded article is taken out and is supplied for each shot of injection molding. According to the buffer sheet95, the liquid resin5Y forming the sealing resin part5is prevented from adhering to the recess part92aand the mold alignment surface92bof the lower mold92. The thickness of the buffer sheet95is, for example, approximately 200 μm.

The manufacturing method of the imaging device1according to the present embodiment is performed by the following procedure. First, as depicted inFIG.15A, the liquid resin5Y is supplied to the lower mold92in which the buffer sheet95is set to the recess part92aand the mold alignment surface92b. A prescribed amount of the liquid resin5Y is applied into the recess part92aof the lower mold92by a dispenser96.

Next, as depicted inFIG.15B, the upper mold91with the workpiece97held under suction in the recess part91ais set to the lower mold92. The workpiece97is set upside down in the mold90with the substrate2side as the upper side. It should be noted that the workpiece97has a configuration in which the glass4with the front surface4acovered with the protective sheet40is provided on the image sensor3(seeFIG.4A).

Next, as depicted inFIG.15C, the upper mold91is lowered or the like to come close to the lower mold92, and mold clamping of the mold90is performed. When the mold90becomes a mold clamping state, the cavity93corresponding to the shape of the sealing resin part5is formed, and the liquid resin5Y is filled into the cavity93while being compressed. In the mold clamping state of the mold90, the buffer sheet95is sandwiched between the mold alignment surface91bof the upper mold91and the mold alignment surface92bof the lower mold92, and the workpiece97is clamped between the upper and lower recess parts91aand92a.

Then, in the mold clamping state of the mold90, as depicted inFIG.16A, the buffer sheet95is pressed by the glass4through the protective sheet40and is partially compressed and deformed in the thickness direction while following the outer shape of the protective sheet40. Accordingly, a level difference G1in the vertical direction is generated between the upper surface40a(the surface on the lower side inFIG.16A) of the protective sheet40and a lower surface5dof the liquid resin5Y, which serves as the upper surface21in the sealing resin part5. It should be noted thatFIG.16Ais a partial enlarged view of E1inFIG.15C.

After the mold clamping of the mold90is performed, a step of curing the liquid resin5Y by UV irradiation, heating, or the like is performed, and the sealing resin part5is formed. Thereafter, the mold90is opened, and the workpiece97subjected to injection molding is taken out.

As depicted inFIG.16B, in the workpiece97taken out from the mold90, the sealing resin part5is formed, and the protective sheet40remains on the glass4. Here, the level difference G1is present between the upper surface40aof the protective sheet40and the upper surface21of the sealing resin part5, and a level difference part98from the sealing resin part5is formed around the protective sheet40.

Thereafter, a step of removing the protective sheet40is performed. In this step, for example, as depicted by the two-dot chain lines inFIG.16B, a highly adhesive tape99is used to peel off the protective sheet40on the glass4(see an arrow H1). In addition, in a case where the residue of the adhesive layer42is present on the front surface4aof the glass4in a state where the protective sheet40is peeled off, the residue is cleaned by use of, for example, an organic solvent.

When the protective sheet40is removed, as depicted inFIG.16C, a configuration in which the sealing resin part5has the protrusion part20is obtained. Thereafter, the step of providing a plurality of solder balls15on the rear surface2bside of the substrate2is performed (seeFIG.5C). By the manufacturing steps as described above, the imaging device1depicted inFIG.1andFIG.2can be obtained. It should be noted that the manufacturing method according to the present embodiment can also be applied as the manufacturing method of the imaging device71of the second embodiment and the imaging device81of the third embodiment.

According to the manufacturing method of the imaging device of the fourth embodiment, since a resin material in a liquid state at normal temperature can be used as a material of the sealing resin part5, it is possible to use a resin material having a physical property that is difficult to obtain with a solid resin such as a tablet used in, for example, injection molding. Specifically, as a material of the sealing resin part5, it is possible to use a resin having physical properties such as low elasticity, low Tg (Tg: glass transition temperature), and transparency.

In addition, according to the manufacturing method of the imaging device of the fourth embodiment, the level difference G1can be formed between the upper surface40aof the protective sheet40and the upper surface21of the sealing resin part5. Accordingly, since the protective sheet40can easily be peeled off, an excellent peeling property of the protective sheet40can be obtained, and the step of removing the protective sheet40can easily be performed.

<8. Configuration Example of Electronic Apparatus>

An example of application of the imaging device according to the above-described embodiments to an electronic apparatus will be described with reference toFIG.17.

The imaging device (solid-state imaging device) according to the present technique can be applied to an electronic apparatus in general that uses a solid-state imaging element for an image capturing part (photoelectric conversion part), such as a camera device, such as a digital still camera or a video camera, a portable terminal device having an imaging function, or a copying machine that uses a solid-state imaging element for an image reading part. The imaging device may be of a configuration formed as a single chip or may be of a module-like configuration having an imaging function in which an imaging part and a signal processing part or an optical system are packaged together.

As depicted inFIG.17, a camera device200as an electronic apparatus includes an optical part202, an imaging device201, a DSP (Digital Signal Processor) circuit203that is a camera signal processing circuit, a frame memory204, a display part205, a recording part206, an operation part207, and a power supply part208. The DSP circuit203, the frame memory204, the display part205, the recording part206, the operation part207, and the power supply part208are appropriately connected to each other through a connection line209such as a bus line. The imaging device201is the imaging device1according to, for example, the first embodiment described above.

The optical part202includes a plurality of lenses, takes in incident light (image light) from an object, and forms an image on the imaging surface of the imaging device201. The imaging device201converts the light quantity of the incident light formed on the imaging surface into an electric signal in pixel units by the optical part202and outputs it as a pixel signal.

The display part205includes, for example, a panel type display device such as a liquid crystal panel or an organic EL (Electro Luminescence) panel and displays a moving or still image captured by the imaging device201. The recording part206records the moving or still image captured by the imaging device201on a recording medium such as a hard disk or a semiconductor memory.

The operation part207issues operation commands on various functions of the camera device200under the operation by the user. The power supply part208appropriately supplies various power sources as operating power sources for the DSP circuit203, the frame memory204, the display part205, the recording part206, and the operation part207to these supply targets.

According to the camera device200described above, regarding the imaging device201, it is possible to suppress the occurrence of scratches and stains on the glass4provided so as to cover the image sensor3from the front surface3aside, and to stabilize the manufacturing yield.

The description of the embodiments described above is an example of the present technique, and the present technique is not limited to the embodiments described above. Therefore, it is obvious that various changes can be made depending on the design and the like even in cases other than the embodiments described above, as long as the technical concept according to the present disclosure is not deviated. In addition, the effects described in the present disclosure are only illustrative and not limited, and there may be other effects. In addition, the configurations of each embodiment described above can appropriately be used in combination.

Note that the present technique can take the following configurations.

A semiconductor device including:a substrate;a semiconductor element that is provided on the substrate;a transparent member that is provided on the semiconductor element through a support part; anda sealing resin part that is formed around the semiconductor element and the transparent member on the substrate,in which the sealing resin part has a protrusion part having an upper surface thereof perpendicular to a plate thickness direction of the substrate, the upper surface being positioned above a front surface of the transparent member in the plate thickness direction.
(2)

The semiconductor device according to (1) above,in which a dimension between the front surface of the transparent member and the upper surface of the protrusion part is 10 to 200 μm in the plate thickness direction.
(3)

The semiconductor device according to (1) above or (2) above,in which the transparent member has a rectangular plate-like outer shape with one plate surface as the front surface,the protrusion part is formed in a frame shape by four side parts along a rectangular outer shape of the transparent member in plan view, anda width of each side part of the protrusion part is 100 μm or more.
(4)

The semiconductor device according to any one of (1) to (3) above,in which the protrusion part has a transparent member covering part extending on the front surface of the transparent member so as to cover an edge part of the front surface of the transparent member.
(5)

The semiconductor device according to any one of (1) to (4) above,in which a sealing resin receiving part that is provided at an edge part on the front surface of the transparent member and is in contact with the protrusion part on an outer side surface is provided.
(6)

An electronic apparatus including:a semiconductor device includinga substrate,a semiconductor element that is provided on the substrate,a transparent member that is provided on the semiconductor element through a support part, anda sealing resin part that is formed around the semiconductor element and the transparent member on the substrate,in which the sealing resin part has a protrusion part having an upper surface thereof perpendicular to a plate thickness direction of the substrate, the upper surface being positioned above a front surface of the transparent member in the plate thickness direction.
(7)

A manufacturing method of a semiconductor device, the method including:a step of mounting a semiconductor element on a substrate;a step of providing, on the semiconductor element through a support part, a transparent member with at least a peripheral edge part of a front surface covered with a protective material; anda step of forming a sealing resin part around the semiconductor element and the transparent member on the substrate by use of a mold.
(8)

The manufacturing method of a semiconductor device according to (7) above,in which, as the protective material, a film-like member that wholly covers the front surface of the transparent member or partially covers the front surface except the peripheral edge part of the front surface is used, anda step of removing the protective material is included after the step of forming the sealing resin part.
(9)

The manufacturing method of a semiconductor device according to (8) above,in which the transparent member has a rectangular plate-like outer shape with one plate surface as the front surface, and,as the protective material, a material having a substantially rectangular outer shape corresponding to the front surface of the transparent member in plan view, and having at least any one of recess parts formed on four side parts and R-shaped parts formed at four corner parts in the outer shape in plan view is used.
(10)

The manufacturing method of a semiconductor device according to (8) above or (9) above,in which, as the protective material, a material having a base material formed by a predetermined material and an adhesive layer for pasting the base material to the transparent member is used.
(11)

The manufacturing method of a semiconductor device according to (8) above,in which the transparent member has a rectangular plate-like outer shape with one plate surface as the front surface,as the protective material, a material having a substantially rectangular outer shape corresponding to the front surface of the transparent member in plan view, having recess parts formed on four side parts in the outer shape in plan view, and having a base material formed by a predetermined material and an adhesive layer for pasting the base material to the transparent member is used, anda recess amount of each of the recess parts with respect to a virtual straight line along a rectangular shape in the outer shape in plan view is 0.7 to 1.3 times a thickness of the adhesive layer.
(12)

The manufacturing method of a semiconductor device according to (10) above or (11) above,in which the predetermined material for forming the base material includes PET, andthe adhesive layer is formed by use of an acrylic resin adhesive.
(13)

The manufacturing method of a semiconductor device according to any one of (7) to (12) above,in which, in the step of forming the sealing resin part, a resin material in a liquid state at normal temperature is used as a resin material for forming the sealing resin part.

REFERENCE SIGNS LIST