Optical sensor module with semiconductor device for drive

An optical sensor with an upper surface having a photoelectric conversion device area and connection pads connected to the photoelectric conversion device area thereof; a semiconductor structure which has a plurality of electrodes for external connection; an insulating layer formed on the periphery of the semiconductor structure; and a first wiring formed on at least one of the semiconductor structure and the optical sensor and connecting at least one of the electrodes for external connection of the semiconductor structure to one of the connection pads of the optical sensor.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the benefit of priority from the prior Japanese Patent Applications No. 2004-018538, filed Jan. 27, 2004 and No. 2004-018540, filed Jan. 27, 2004, the entire contents of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an optical sensor module, and more particularly, an optical sensor module having a semiconductor device for drive.

2. Description of the Related Art

A conventional optical sensor module described in Japanese Laid-Open Patent Application No. 2003-264274 titled “CAMERA MODULE” has a configuration, in which an optical sensor is situated on the upper surface of a hard circuit board being a thick plate having a function as a supporting component; and chip components composed of a semiconductor device having a function as a peripheral drive circuit of the optical sensor, resistors, capacitors, etc., are provided on the lower surface of the circuit board; and the chip components composed of the semiconductor device, the resistors, the capacitors, etc. are covered with a sealing film.

As mentioned above, at the conventional optical sensor module, the optical sensor is situated on the upper surface of the circuit board of the thick plate that also functions as the supporting component; electronic components for drive composed of the semiconductor device having the function as the peripheral drive circuit of the optical sensor, the resistors, the capacitors, etc. are provided on the lower surface of the circuit board; and wiring for connecting the optical sensor and the electronic components for drive is formed in the circuit board. Therefore, the thickness of the circuit board is hardly utilized effectively, consequently, the entire thickness of the optical sensor module becomes large.

It is therefore an object of the present invention to provide an optical sensor module whose thickness is thin.

SUMMARY OF THE INVENTION

The present invention comprises wiring for electrically connecting connection pads of an optical sensor with electrodes for connecting to an external device of a semiconductor device provided at least at one part on an insulation layer formed at and around the semiconductor device, therefore, a circuit board on which the semiconductor device and the optical sensor are mounted is not required, consequently, there is an advantage that the entire optical sensor module can be thin.

In order to obtain the above-mentioned advantage, the optical sensor module of the present invention comprises an optical sensor comprising a first semiconductor substrate, a photoelectric conversion device area provided on an upper surface of the first semiconductor substrate and a plurality of connection pads connected to the photoelectric conversion device area; a semiconductor structure comprising a second semiconductor substrate having an integrated circuit provided thereon and a plurality of electrodes for external connection formed on the second semiconductor substrate; an insulating layer formed on a periphery of the semiconductor structure; an insulating film formed on the insulating layer; and a first wiring connecting at least one of the electrodes of the semiconductor structure to one of the connection pads of the optical sensor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The optical sensor module according to the present invention is explained based on embodiments shown in the drawings.

First Embodiment

FIG. 1is a sectional view of an optical sensor module according to a first embodiment of the present invention. This optical sensor module provides a base plate1of a rectangular shaped plane made of a glass cloth base epoxy resin, etc. Upper surface wiring2made of copper foil is formed on the upper surface of the base plate1, and lower surface wiring3made of copper foil is formed on the lower surface thereof. In this case, the upper surface wiring2is a ground layer (noise shield layer) having a pattern covering the whole surface, and the lower surface wiring3is normal wiring. An overcoat film4made of such as solder resist is formed on the bottom surface of the base plate1including the lower surface wiring3.

At a predetermined position on the upper surface of the upper surface wiring2, the lower surface of a semiconductor structure5of a rectangular shaped plane having a size being smaller to a certain degree than the size of the base plate1is glued via an adhesive layer6made of a die bonding material. In this case, the semiconductor structure5has a function as a peripheral drive circuit of an optical sensor35mentioned later, and provides wiring15, pillar-shaped electrodes16(electrodes for connecting to an external device), and a sealing film17, mentioned later, and is generally called as a CSP (chip size package). Especially, as mentioned later, the following method is used, that is, after the wiring15, the pillar-shaped electrodes16, and the sealing film17were formed on a silicon wafer, each semiconductor structure5is obtained by dicing, therefore, in particular, this is called a wafer level CPS (W-CPS). Next, the configuration of the semiconductor structure5is explained.

The semiconductor structure5provides a silicon substrate (semiconductor substrate)7. The lower surface of the silicon substrate7is glued on the upper surface of the base plate1via the adhesive layer6. At the center part of the upper surface of the silicon substrate7, an integrated circuit8having a predetermined function is provided, at the rim part of the upper surface of the silicon substrate7, a plurality of connection pads9(electrodes for connecting to an external device) made of an aluminum type metal, etc. are provided by connecting to the integrated circuit8. The upper surface of the silicon substrate7except the center part of the connection pads9, an insulation film10made of silicon oxide, etc. is formed, and the center part of the connection pads9is exposed via an opening part11formed at the insulation film10.

On the upper surface of the insulation film10, a protection film12made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, an opening part13is formed in the protection film12at the part corresponding to the opening part11of the insulation film10. On the upper surface of the protection film12, a bedding metal layer14made of copper, etc. is formed. On the entire upper surface of the bedding metal layer14, the wiring15made of copper is formed. One end part of the wiring15including the bedding metal layer14is connected to the connection pads9via the both of the opening parts11and13.

On the upper surface of the connection pad part of the wiring15, the pillar-shaped electrodes16(electrodes for connecting to an external device) are formed. On the upper surface of the protection film12including the wiring15, the sealing film17made of an epoxy type resin, a polyimide type resin, etc. is formed, in a manner that the level of the upper surface of the sealing film17becomes the same level of the upper surface of the pillar-shaped electrodes16. As mentioned above, the semiconductor structure5called the W-CSP has a configuration that includes the silicon substrate7, the integrated circuit8, the connection pads9, and the insulation film10, and further includes the protection film12, the wiring15, the pillar-shaped electrodes16, and the sealing film17.

On the upper surface of the upper surface wiring2around the semiconductor structure5, an insulation layer18of a rectangular frame shape is formed in a manner that the level of the upper surface of the insulation layer18becomes almost the same level of the upper surface of the semiconductor structure5. The insulation layer18is made of, for example, a thermosetting resin such as an epoxy type resin, a polyimide type resin, or a material which a reinforcement material made of silica filler, a glass fiber, etc. is mixed in such a thermosetting resin.

On the upper surfaces of the semiconductor structure5and the insulation layer18, an insulation film19is formed in a manner that the upper surface of the insulation film19is made flat. The insulation film19is made of a material generally called a build up material using for a build up substrate, for example, a material which a reinforcement material made of silica filler, a glass fiber, etc. is mixed in a thermosetting resin such as an epoxy type resin, a BT (Bismaleimide Triazine) resin, etc.

An opening part20is formed in the insulation film19at the part corresponding to the center part of the upper surface of the pillar-shaped electrodes16. On the upper surface of the insulation film19, a bedding metal layer21made of copper, etc. is formed. On the entire upper surface of the bedding metal layer21, wiring22composed of a copper layer and a gold layer formed on the upper surface of the copper layer is formed. The wiring22including the bedding metal layer21is connected to the upper surface of the pillar-shaped electrodes16via an opening part20of the insulation film19.

On the upper surface of the insulation film19including the wiring22, an overcoat film23made of solder resist, etc. is formed. At parts of the overcoat film23, corresponding to a first and a second connection pad parts and external connection terminals of the wiring22, a first to third opening parts24to26are formed. In addition, the gold layer of wiring22is formed only in the portion exposed to the first opening part24in an area that is later mentioned which carries out wiring bonding, while a copper layer may be formed outside this region.

On the upper surfaces of the overcoat film23, between the second opening parts25, which are one group as a pair, a chip component27composed of resistors, capacitors, etc. is situated. Electrodes at both sides of the chip component27are connected to the second connection pad part of the wiring22exposed via the second opening parts25, which are one group as a pair, via the solder28.

To an external connection terminal of the wiring22exposed via the third opening part26, one end part of a flexible wiring plate29is glued by an anisotropic conductive adhesive30. The flexible wiring plate29has a structure, in which wiring32is formed on the lower surface of a film base31; an overcoat film33made of solder resist, etc. is formed on the lower surface of the film base31except both end parts of the wiring32; and the both end parts of the wiring32are exposed via opening parts34(one of them is not shown) formed at the overcoat film33. And one end part of the wiring32exposed via the opening part34of the flexible wiring plate29is connected to the external connection terminal of the wiring22exposed via the third opening part26, via the anisotropic conductive adhesive30.

On a predetermined position of the upper surface of the overcoat film23, the lower surface of the optical sensor35of the rectangular shaped plane is glued via an adhesive layer36made of a die bonding material. The optical sensor35provides a silicon substrate (semiconductor substrate)37. The lower surface of the silicon substrate37is glued on the upper surface of the overcoat film23via the adhesive layer36. At the center part of the upper surface of the silicon substrate37, a photoelectric conversion device area38including elements such as a CCD, a photodiode, and a phototransistor is formed, and at the rim part of the upper surface of the silicon substrate37, a plurality of connection pads39made of an aluminum type metal, etc. are formed and connected to the photoelectric conversion device area38by wiring for connection (not shown).

On the upper surface of the silicon substrate37except the center part of the connection pads39, an insulation film40made of silicon oxide, etc. is formed, and the center part of the connection pads39is exposed via an opening part41formed in the insulation film40. And the connection pads39of the optical sensor35, via a bonding wire42made of gold, are connected to the first connection pad part of the wiring22exposed via the first opening part24of the overcoat film23.

At a part around the optical sensor35and at a predetermined position of the upper surface of the overcoat film23including the bonding wire42, a sealing material43made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, a glass plate45for cutting ultraviolet rays situated on the upper surface of the optical sensor35via a spacer44is glued at the upper surface side of the sealing material43. The glass plate45has a function as a sealing material for protecting the photoelectric conversion device area38of the optical sensor35, in addition to the function for cutting ultraviolet rays.

A lens holder46is situated at the outside of the glass plate45and the sealing material43. To the lens holder46, a holding cylinder48for holding the lens47situated above the glass plate45is attached in a manner that the holding cylinder48can rotate. In this, the chip component27is situated on the upper surface of the overcoat film23around the lens holder46including the optical sensor35.

As mentioned above, in this optical sensor module, the insulation layer18is formed on the upper surface of the base plate1around the semiconductor structure5having the function as the peripheral drive circuit of the optical sensor35, the wiring22is formed on the semiconductor structure5and the insulation layer18, and the optical sensor35is situated on the overcoat film23covering the wiring22. Therefore, it is not necessary to provide a circuit board on which the semiconductor structure5and the optical sensor35are mounted, consequently, the entire optical sensor module can be made thin. Further, the chip component27is situated on the upper surface of the overcoat film23around the lens holder46including the optical sensor35, therefore, even if the chip component27is provided, it is possible that the entire module does not become thick. Here, although not meaning to limit the embodiment, the thickness (height) of each film, material, and component is illustrated. The thickness of the silicon substrate7is 0.2 to 0.4 mm, the height of the pillar-shaped electrodes16are 0.05 to 0.15 mm, the thickness of the semiconductor structure5is 0.25 to 0.55 mm, the thickness of each of the base plate1, the insulation film19, and the overcoat film23is 0.05 to 0.1 mm, and the thickness from the lower surface of the overcoat film4of the lowest surface to the upper surface of the overcoat film23of the highest surface, that is, the entire thickness of a drive semiconductor package except the optical sensor35is 0.6 to 0.8 mm. In other words, the thickness of the optical sensor module except mechanical components such as the lens47, the holding cylinder48, the lens holder46, etc. can be 1 mm or less.

Second Embodiment

FIG. 2is a sectional view of an optical sensor module according to a second embodiment of the present invention. At this optical sensor module, the points being largely different from the case shown inFIG. 1are as follows. The parts, except the optical sensor35and the lens holder46, that is, the base plate1, the semiconductor structure5, and the insulation layer18are situated inverted, further, a vertical conduction part56, for electrically connecting, the pillar-shaped electrodes16of the semiconductor structure5facing the opposite surface side of the surface side at which the optical sensor35is situated, with the connection pads39of the optical sensor35, is provided. And the upper surface wiring2and the lower surface wiring3and the spacer44are not provided.

InFIG. 2, on the lower surface of the base plate1, the semiconductor structure5is glued via the adhesive layer6. On the lower surface of the base plate1around the semiconductor structure5, the insulation layer18is formed. On the lower surface of the semiconductor structure5and the insulation layer18, the wiring22including the bedding metal layer21is formed via the insulation film19. On the lower surface of the overcoat film23, the chip component27and the flexible wiring plate29are formed.

On the upper surface of the base plate1, a bedding metal layer51made of copper, etc. is formed. On the entire upper surface of the bedding metal layer51, wiring52made of copper is formed. In this case, the wiring52including the bedding metal layer51formed on the upper surface of the base plate1on the semiconductor structure5is a ground layer (noise shield layer) having a pattern covering the whole surface.

On the upper surface of the base plate1including the wiring52, an overcoat film53made of solder resist, etc. is formed. An opening part54is formed in the overcoat film53at a part corresponding to the connection pads of the wiring52. And the connection pads39of the optical sensor35, via the bonding wire42, are connected to the connection pad part of the wiring52exposed via the opening part54of the overcoat film53.

A part of the wiring52including the bedding metal layer51and a part of the wiring22including the bedding metal layer21are connected via the vertical conduction part56composed of, a bedding metal layer56amade of copper, etc. situated on the inside wall surface of a through hole55formed at a predetermined position of the insulation layer18and the insulation film19, and a copper layer56b. In this case, in the vertical conduction part56, in order to improve electric conduction of the vertical wiring, a conductive material57made of such as a copper paste, a silver paste, and a conductive resin may be filled in; however, it may be filled with an insulating resin or it may be hollow.

At a part of the glass plate45except the rim part of the lower surface, a concave part45ais formed by, for example, a processing method such as counter boring. And the rim part of the lower surface of the glass plate45is positioned on the upper surface of the optical sensor35. And on the lower surface of the overcoat film23, in addition to the chip component27, a semiconductor chip58being a bare chip is situated. The connection pads59of the semiconductor chip58are connected to the connection pad part of the wiring22via a solder ball60. The bare chip is, a semiconductor chip in a state, obtained by dicing a wafer in which integrated semiconductor circuits are formed, or a semiconductor chip in which a protection film is formed around integrated circuits of such semiconductor device and signifies what does not have a lead frame.

Third Embodiment

FIG. 3is a sectional view of an optical sensor module according to a third embodiment of the present invention. As this optical sensor module, the points being largely different from the case shown inFIG. 1are as follows. An optical sensor61, having a structure mentioned later, is connected to the connection pad part of the wiring22via a solder ball77, the chip component27is situated on the base plate1and embedded in the insulation layer18, and a vertical conduction part84for electrically connecting the chip component27with the wiring22is provided. In this case, the upper surface wiring2and the lower surface wiring3shown inFIG. 1are not provided. In case of this embodiment, the optical sensor61is connected by the solder ball77, therefore, it is not necessary that a gold layer is formed on the wiring22, only the copper layer is enough for the whole surface.

Next, the structure of the optical sensor61is explained. The optical sensor61provides a silicon substrate (semiconductor substrate)62. At the center part of the upper surface of the silicon substrate62, a photoelectric conversion device area63including elements such as a CCD, a photodiode, a phototransistor is provided, and at the rim part of the upper surface of the silicon substrate62, a plurality of connection pads64made of an aluminum type metal, etc. are provided by connecting to the photoelectric conversion device area63.

On the upper surface of the silicon substrate62except the center part of the connection pads64, an insulation film65made of silicon oxide, etc. is formed, and the center part of the connection pads64are exposed via an opening part66formed in the insulation film65. On the lower surface and around the lower surface of the silicon substrate62, an insulation layer67made of an epoxy type resin, a polyimide type resin, etc is formed. In this case, the level of the upper surface of the insulation layer67formed around the silicon substrate62is almost the same level of the upper surface of the insulation film65formed on the upper surface of the silicon substrate62.

On the upper surfaces of the insulation film65and insulation layer67, a bedding metal layer68made of copper, etc. is formed. On the entire upper surface of the bedding metal layer68, upper surface wiring69made of copper is formed. One end part of the upper surface wiring69including the bedding metal layer68is connected to the connection pads64via an opening part66of the insulation film65. On the upper surfaces of the insulation film65and insulation layer67including the upper surface wiring69, a glass plate71for cutting ultraviolet rays is situated via a transparent adhesive layer70made of a transparent epoxy type resin, etc.

An opening part72is formed in the insulation layer67at a part corresponding to the connection pad part of the upper surface wiring69. On the lower surface of the insulation layer67, a bedding metal layer73made of copper, etc is provided. On the entire lower surface of the bedding metal layer73, lower surface wiring74made of copper is formed. The bedding metal layer73and the lower surface wiring74become a penetrating electrode penetrating in the thickness direction of the insulation layer67, and are electrically connected to the lower surface wiring74and the upper wiring69via this penetrating electrode. On the lower surface of the insulation layer67including the lower surface wiring74, an overcoat film75made of solder resist, etc. is formed.

An opening part76is formed in the overcoat film75at a part corresponding to the connection pad part of the lower surface wiring74. In and under the opening part76, a solder ball77is formed by connecting to the connection pad part of the lower surface wiring74. And the optical sensor61is mounted on the overcoat film23, by that the solder ball77is connected to the connection pad part of the wiring22exposed via the opening part24of the overcoat film23.

Next, the chip component27and the like are explained. At a predetermined position of the upper surface of the base plate1, a pair of connection terminals78made of copper foil is formed. Inside a through hole formed in the base plate1under the pair of the connection terminals78, a vertical conduction part79made of a copper paste, a silver paste, a conductive resin, etc. is formed by connecting to the connection terminals78. To the upper surface of the pair of connection terminals78, electrodes at both sides of the chip component27are connected via the solder28. And the chip component27including the solder28is embedded in the insulation layer18.

On the lower surface of the base plate1, a bedding metal layer80made of copper, etc. is formed. On the entire lower surface of the bedding metal layer80, wiring81made of copper is formed. One end part of the wiring81including the bedding metal layer80is connected to the vertical conduction part79. On the entire lower surface of the base plate1including the wiring81, an overcoat film82made of solder resist, etc. is formed.

The wiring81including the bedding metal layer80and a part of the wiring22including the bedding metal layer21are connected via a vertical conduction part84composed of, a bedding metal layer84amade of copper, etc. situated on the inside wall surface of a through hole83formed at a predetermined position of the base plate1, the insulation layer18, and the insulation film19; and a copper layer84b. In this case, also, in the vertical conduction part84, in order to make electric conductivity of the vertical wiring excellent, a conductive material85made of such as a copper paste, a silver paste, and a conductive resin is filled, however, it may be good to fill an insulation resin, or it may be right to be vacant.

And according to this optical sensor module, the part except the vertical conduction part84in the insulation layer18formed on the base plate1around the semiconductor structure5is a dead space, therefore, when the chip component27is situated in this dead space on the base plate1, the space can be used effectively.

Fourth Embodiment

FIG. 4is a sectional view of an optical sensor module according to a fourth embodiment of the present invention. At this optical sensor module, the points being largely different from the case shown inFIG. 1are as follows. That is, the semiconductor structure5and the optical sensor35are not laminated, but are juxtaposed in a plane state on base plate1. In this case, the upper surface wiring2, the lower surface wiring3, and the overcoat film4shown inFIG. 1are not formed.

That is, at a predetermined position on the upper surface of the base plate1, the semiconductor structure5is glued via the adhesive layer6, and at other predetermined positions on the upper surface of the base plate1, the optical sensor35is glued via the adhesive layer36. In this case, the semiconductor structure5has a structure in which the pillar-shaped electrodes16and the sealing film17shown inFIG. 1are not provided, and an overcoat film86is formed on the upper surface of the protection film12including the wiring15.

And the wiring22including the bedding metal layer21is connected to the connection pad part of the wiring15of the semiconductor structure5and the connection pads39of the optical sensor35via the opening part20formed in the insulation film19, etc. In this, the insulation layer18, the insulation film19, and the overcoat film23are made of a transparent epoxy type resin, etc. And at a part of the glass plate45except the rim part of the lower surface, the concave part45ais formed by, for example, a processing method such as counter boring. And the rim part of the lower surface of the glass plate45is situated on the upper surface of the overcoat film23. In this, the semiconductor structure5shown in the fourth embodiment can be applied to the optical sensor module shown in each of the first to third embodiments.

Next, as representation, an example of a manufacturing method of a part of the optical sensor module shown inFIG. 3is explained. First, an example of a manufacturing method of the semiconductor structure5is explained. In this case, first, as shown inFIG. 5, a partially formed item, in which an integrated circuit8, a connection pads9made of an aluminum type metal, etc., an insulation film10made of silicon oxide, etc., a protection film12made of an epoxy type resin, a polyimide type resin, etc., are formed on a silicon substrate (semiconductor substrate)7of a wafer state; and the center part of the connection pad9is exposed via opening parts11and13formed in the insulation film10and the protection film12, is prepared.

Next, as shown inFIG. 6, on the entire upper surface of the protection film12including the upper surface of the connection pad9exposed via both of the opening parts11and13, a bedding metal layer14is formed. In this case, the bedding metal layer14can be made of only a copper layer formed by electroless plating, of only a copper layer formed by sputtering, or of a material in which a copper layer is formed by sputtering on a thin film layer of titanium, etc. formed by sputtering.

Next, on the upper surface of the bedding metal layer14, a plating resist film91is formed by patterning. In this case, an opening part92is formed in the plating resist film91at a part corresponding to a region forming wiring15. Next, by executing copper electro plating by using the bedding metal layer14as a plating current route, the wiring15is formed on the upper surface of the bedding metal layer14in the opening part13of the plating resist film91. Next, the plating resist film91is removed.

Next, as shown inFIG. 7, a plating resist film93is formed on the upper surface of the bedding metal layer14including the wiring15by patterning. In this case, an opening part94is formed in the plating resist film93at a part corresponding to a region forming pillar-shaped electrodes16. Next, by executing copper electro plating by using the bedding metal layer14as a plating current route, the pillar-shaped electrodes16are formed on the upper surface of the connection pad part of the wiring15in the opening part94in the plating resist film93. Next, the plating resist film93is removed, and when unnecessary parts of the bedding metal layer14were removed by etching by using the wiring15as a mask, as shown inFIG. 8, the bedding metal layer14remains only under the wiring15.

Next, as shown inFIG. 9, by a screen printing method, a spin coating method, a die coating method, etc., a sealing film17, whose thickness is thicker than the height of the pillar-shaped electrodes16, made of an epoxy type resin, a polyimide type resin, etc. is formed on the entire upper surface of the protection film12including the pillar-shaped electrodes16and the wiring15. Therefore, in this state, the upper surface of the pillar-shaped electrodes16are covered with the sealing film17.

Next, the upper surface sides of the sealing film17and the pillar-shaped electrodes16are properly polished, and as shown inFIG. 10, the upper surface of the pillar-shaped electrodes16are exposed, and the upper surface of the sealing film17including the upper surface of these exposed pillar-shaped electrodes16are flattened. In this, the reason why the upper surface side of the pillar-shaped electrodes16are polished is because there is dispersion in the height of the pillar-shaped electrodes16formed by electro plating to get rid of this dispersion and to make the height of the pillar-shaped electrodes16uniform.

Next, as shown inFIG. 11, an adhesive layer6is glued on the entire lower surface of the silicon substrate7. The adhesive layer6is made of a die bonding material such as an epoxy type resin and a polyimide type resin, and is glued on the silicon substrate7in a half hard state by applying heat and pressure. Next, the adhesive layer6glued on the silicon substrate7is attached on dicing tape (not shown), and after a dicing process shown inFIG. 12, when the dicing tape is removed, as shown inFIG. 3, a plurality of the semiconductor devices5having the adhesive layer6on the lower surface of the silicon substrate7are acquired.

Next, by using the semiconductor structure5obtained by the processes mentioned above, an example of a manufacturing method of a part including the semiconductor structure5shown inFIG. 3is explained. First, as shown inFIG. 13, a base plate whose plane shape is rectangular and has a size in which a plurality of base plates1can be obtained, is prepared, this does not limit the base plate.

In this case, at a predetermined position of the upper surface of the base plate1, a pair of connection terminals78made of copper foil is formed, and in through holes formed in the base plate1under the pair of connection terminals78, a vertical conduction part79made of a copper paste, a silver paste, a conductive resin, etc. is formed by connecting to the connection terminal78.

Next, at a plurality of predetermined positions of the upper surface of the base plate1, the adhesive layer6glued on the lower surface of the silicon substrate7of each of the semiconductor devices5is attached. At this adhesion, the adhesive layer6is normally hardened by applying heat and pressure. Next, on the upper surfaces of the pair of connection terminals78, electrodes of both sides of a chip component27composed of capacitors, resistors, etc. are connected via solder28, by this, the chip component27is situated at a predetermined position of the upper surface of the base plate1. In this, it is possible that the semiconductor structure5is situated after disposing the chip component27.

Next, as shown inFIG. 14, on the upper surface of the base plate1including the chip component27and the solder28around the semiconductor structure5, a layer for forming insulation layer18ais formed by a screen printing method, a spin coating method, etc. The layer for forming insulation layer18ais made of, for example, a thermosetting resin such as an epoxy type resin, and a polyimide type resin, or a material in which a reinforcement material made of silica filler, a glass fiber, etc. is mixed in such a thermosetting resin.

Next, on the upper surfaces of the semiconductor structure5and the layer for forming insulation layer18a, a sheet for forming insulation film19ais situated. The sheet for forming insulation film19ais preferably made of a build up material of a sheet shape, as this build up material, there is a material in which a thermosetting resin is made a half hard state by mixing silica filler in a thermosetting resin such as an epoxy resin. The material for the sheet for forming insulation film19ais not limited to this.

In this, as the sheet for forming insulation film19a, a prepreg material in which a thermosetting resin such as an epoxy type resin is impregnated in a glass cloth and the thermosetting resin is made a sheet shape by making it a half hard state, or a sheet material made of only a thermosetting resin in a half hard state in which silica filler is not mixed, can be used.

Next, as shown inFIG. 15, by using a pair of heat and pressure applying plates95and96, the layer for forming insulation layer18aand the sheet for forming insulation film19aare heated and pressed from up and down. Then, on the upper surface of the base plate1including the chip component27and the solder28around the semiconductor structure5, an insulation layer18is formed, and on the upper surface of the semiconductor structure5and the insulation layer18, an insulation film19is formed. In this case, the upper surface of the insulation film19becomes a flat surface because the upper surface of the insulation film19is pushed by the lower surface of the heat and pressure applying plate95. Therefore, a polishing process for flattening the upper surface of the insulation film19is not needed.

Next, as shown inFIG. 16, by using a laser process radiating laser beams, an opening part20is formed in the insulation film19at a part corresponding to the center part of the upper surface of pillar-shaped electrodes16. And a through hole83is formed at a predetermined position of the insulation film19, the insulation layer18and the base plate1by using a mechanical drill. Next, corresponding to the necessity, epoxy smears, etc. generated in the opening part20, the through hole83, etc. are removed by a de-smearing process.

Next, as shown inFIG. 17, on the entire upper surface of the insulation film19including the upper surface of the pillar-shaped electrodes16exposed via the opening part20, on the entire lower surface of the base plate1including the lower surface of the vertical conduction part84, and on the inside wall surface of the through hole83, bedding metal layers21,80, and84aare formed by copper electroless plating. Next, on the upper surface of the bedding metal layer21, a plating resist film97is formed by patterning, and on the lower surface of the bedding metal layer80, a plating resist film98is formed by patterning. In this case, an opening part99is formed in the plating resist film97at a part corresponding to the region forming the wiring22. And an opening part100is formed in the plating resist film98at a part corresponding to the region forming the wiring81.

Next, by executing copper electroplating by using the bedding metal layers21,80and84aas plating current routes, the wiring22is formed on the upper surface of the bedding metal layer21in the opening part99of the plating resist film97, and the wiring81is formed on the lower surface of the bedding metal layer80in the opening part100of the plating resist film98, further, a copper layer84bis formed on the surface of the bedding metal layer84ain the through hole83.

Next, both the plating resist films97and98are removed, and when unnecessary parts of the bedding metal layers21and80were removed by etching by using the wiring22and81as a mask, as shown inFIG. 18, the bedding metal layer21remains only under the wiring22, and the bedding metal layer80remains only on the wiring81. And at this state, the vertical conduction part84composed of the bedding metal layer84aand the copper layer84bare formed in the through hole83.

Next, as shown inFIG. 19, by a screen printing method, etc., a conductive material85made of a copper paste, a silver paste, a conductive resin, etc. is filled in the vertical conduction part84. Next, corresponding to the necessity, an excess conductive material85sticking out form the vertical conduction part84is removed by buff polishing, etc. Next, by a screen printing method, a spin coating method, etc., an overcoat film23made of solder resist, etc. is formed on the upper surface of the insulation film19including the wiring22. In this case, in the overcoat film23at parts corresponding to the connection pad part and the external connection terminal of the wiring22, opening parts24and26are formed. And an overcoat film82made of solder resist, etc. is formed on the entire lower surface of the base plate1including the wiring81.

Next, between the semiconductor devices5being adjacent to each other, when the overcoat film23, the insulation film19, the insulation layer18, the base plate1and the overcoat film82were cut, a plurality of parts including the semiconductor devices5shown inFIG. 3are obtained.

Next, an example of a manufacturing method of the optical sensor61shown inFIG. 3is explained. First, as shown inFIG. 20, a partially formed item, in which a photoelectric conversion device area63, a connection pad64made of an aluminum type metal etc., an insulation film65made of silicon oxide, etc. are formed on a silicon substrate (semiconductor substrate)62of a wafer state; and the center part of the connection pad64is exposed via an opening part66formed in the insulation film65, is prepared.

Next, as shown inFIG. 21, on the entire upper surface of the insulation film65including the upper surface of the connection pad64exposed via the opening part66, a bedding metal layer68is formed by copper electroless plating, etc. Next, a plating resist film101is formed on the upper surface of the bedding metal layer68by patterning. In this case, an opening part102is formed in the plating resist film101at a part corresponding to the region forming upper surface wiring69.

Next, by executing copper electro plating by using the bedding metal layer68as a plating current route, upper surface wiring69is formed on the upper surface of the bedding metal layer68in the opening part102of the plating resist film101. Next, the plating resist film101is removed, and when unnecessary parts of the bedding metal layer68were removed by etching by using the upper surface wiring69as a mask, as shown inFIG. 22, the bedding metal layer68remains only under the upper surface wiring69.

Next, as shown inFIG. 23, on the entire upper surface of the insulation film65including the upper surface wiring69, a glass plate71is glued via a transparent adhesive layer70made of a transparent epoxy type resin, etc. Next, of the silicon substrate62of a wafer state, unnecessary parts not corresponding to the silicon substrate62shown inFIG. 3and the insulation film65thereon, as shown inFIG. 24, are removed by dicing, etching, etc. Therefore, in this state, the lower surfaces of the bedding metal layer68and the transparent adhesive layer70situated around the silicon substrate62are exposed, and these exposed surfaces become almost the same level of the upper surface of the insulation film65.

Next, as shown inFIG. 25, by a screen printing method, a spin coating method, etc., on the lower surface of the silicon substrate62including the bedding metal layer68and the transparent adhesive layer70situated around the silicon substrate62, an insulation layer67made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, an opening part72is formed in the insulation layer67at a part corresponding to the connection pad part of the upper surface wiring69including the bedding metal layer68.

Next, on the entire lower surface of the insulation layer67including the connection pad part of the upper surface wiring69including the bedding metal layer68exposed via the opening part72, a bedding metal layer73is formed by copper electroless plating, etc. Next, a plating resist film103is formed by patterning on the lower surface of the bedding metal layer73. In this case, an opening part104is formed in the plating resist film103at a part corresponding to the region forming the lower surface wiring74.

Next, by executing copper electroplating by using the bedding metal layer73as a plating current route, on the lower surface of the bedding metal layer73in the opening part104of the plating resist film103, lower surface wiring74is formed. Next, the plating resist film103is removed, and when unnecessary parts of the bedding metal layer73were removed by etching by using the lower surface wiring74as a mask, as shown inFIG. 26, the bedding metal layer73remains only on the lower surface wiring74.

Next, as shown inFIG. 27, by a screen printing method, a spin coating method, etc., an overcoat film75made of solder resist, etc. is formed on the lower surface of the insulation layer67including the lower surface wiring74. In this case, an opening part76is formed in the overcoat film75at a part corresponding to the connection pad part of the lower surface wiring74. Next, in and under the opening part76, a solder ball77is formed by connecting to the connection pad part of the lower surface wiring74.

Next, as shown inFIG. 28, between the silicon substrate62being adjacent to each other, when the glass plate71, the transparent adhesive layer70, the insulation layer67and the overcoat film75were cut, a plurality of optical sensors61shown inFIG. 3are obtained. In this, at each of the above-mentioned embodiments, the optical sensor is explained as one in which the photoelectric conversion device area is formed on the semiconductor substrate, however, as the optical sensor, one in which a photoelectric conversion element is formed by a semiconductor thin film on an insulation substrate, can be used. And the wiring22for connecting the semiconductor device and the optical sensor is explained in a case of only one layer, the wiring forming on the semiconductor device can be a plurality of layers using a dielectric inter layer. And the overcoat film23covering the wiring22is made of solder resist, however, can be made of other materials such as a buildup material. Further, as the overcoat film23, an insulation resin sheet formed in a sheet shape beforehand, in which a glass fiber etc. are distributed, is glued by a thermo compression bonding, etc., can be used, by not forming a film by using a screen printing method, a coating method, etc.

Fifth Embodiment

FIG. 29is a sectional view of an optical sensor module according to a fifth embodiment of the present invention. In this embodiment, an optical sensor module110is mounted on a circuit board201. The circuit board201has a structure, in which a plurality of connection pads203made of an aluminum type metal, etc. are situated on the upper surface of an insulation substrate202made of a glass cloth base epoxy resin, etc., an overcoat film204made of solder resist, etc. is situated on the upper surface of the insulation substrate202except the center part of the connection pads203, and the center part of the connection pads203is exposed via an opening part205formed in the overcoat film204.

The optical sensor module110provides an optical sensor111and semiconductor structure131having a function as a peripheral drive circuit of the optical sensor111. First, the structure of the optical sensor111is explained. The optical sensor111provides a silicon substrate (semiconductor substrate)112. On the center part of the upper surface of the silicon substrate112, a photoelectric conversion device area113including elements such as a CCD, a photodiode, a phototransistor, etc. is formed, on the rimpart of the upper surface of the silicon substrate112, a plurality of connection pads114made of an aluminum type metal, etc. are formed by connecting to the photoelectric conversion device area113.

On the upper surface of the silicon substrate112except the center part of the connection pads114, a protection film115made of silicon oxide, etc. is situated, and the center part of the connection pads114are exposed via opening parts116formed in the protection film115. On the upper surface of the protection film115and around the silicon substrate112, an insulation layer117made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, the level of the lower surface of the insulation layer117situated outside the side surface of the silicon substrate112is the same level of the lower surface of the silicon substrate112.

At a part in the insulation layer117corresponding to the photoelectric conversion device area113, an opening part118is formed. At a part in the insulation layer117corresponding to the opening parts116of the protection film115, an opening part119is formed. At a predetermined position of the insulation layer117formed outside the side surface of the silicon substrate112, a through hole120is formed.

On the upper surface of the insulation layer117, a bedding metal layer121made of copper, etc. is formed. On the entire upper surface of the bedding metal layer121, wiring122made of copper is formed. One end part of the wiring122including the bedding metal layer121is connected to the connection pads114via the opening part119in the protection film115. The other end part of the wiring122including the bedding metal layer121is connected to a penetrating electrode123composed of a bedding metal layer123aand a copper layer123bformed in a through hole120of the protection film115in an integrated manner. In this case, the level of the lower surface of the penetrating electrode123is the same level of the lower surface of the insulation layer117. On the lower surface of the penetrating electrode123, a solder ball124is situated.

Next, the configuration of the semiconductor structure131is explained. The semiconductor structure131provides a silicon substrate (semiconductor substrate)132. On the center part of the upper surface of the silicon substrate132, an integrated circuit133having a predetermined function is situated, and on the rim part of the upper surface of the silicon substrate132, a plurality of connection pads134(electrodes for connecting to an external device) made of an aluminum type metal, etc. are formed by connecting to the integrated circuit133. On the upper surface of the silicon substrate132except the center part of the connection pads134, a protection film135made of silicon oxide, etc. is formed, and the center part of the connection pads134is exposed via an opening part136formed in the protection film135.

On the upper surface of the protection film135and around the silicon substrate132, an insulation layer137made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, the level of the lower surface of the insulation layer137formed outside of the side surface of the silicon substrate132is the same level of the lower surface of the silicon substrate132. At a part of the insulation layer137corresponding to the opening part136in the protection film135, an opening part138is formed. At a predetermined position of the insulation layer137formed outside of the side surface of the silicon substrate132, a through hole139is formed.

On the upper surface of the insulation layer137, a bedding metal layer140made of copper, etc. is formed. On the entire upper surface of the bedding metal layer140, wiring141made of copper is formed. One end part of the wiring141including the bedding metal layer140is connected to the connection pads134via a protective film and the opening parts136and138in the insulation layers135and137. A part of the other end part of the wiring141including the bedding metal layer140is connected to a penetrating electrode142composed of a bedding metal layer142aand a copper layer142bformed in a through hole139of the insulation layer137in an integrated manner. In this case, the level of the lower surface of the penetrating electrode142is the same level of the lower surface of the insulation layer137. On the lower surface of the penetrating electrode142, a solder ball143is situated.

On the upper surface of a part of the connection pad part of the wiring141, pillar-shaped electrodes (electrodes for connecting to an external device)144are formed. On and around the upper surface of the insulation layer137including the pillar-shaped electrodes144(electrodes for connecting to an external device) and the wiring141, a sealing film145made of an epoxy type resin, a polyimide type resin, etc. is formed in a manner that the upper surface thereof is the same level of the upper surface of the pillar-shaped electrodes144. In this case, the level of the lower surface of the sealing film145formed outside of the side surface around the insulation layer137is the same level of the lower surface of the insulation layer137.

And the optical sensor111is mounted on the semiconductor structure131, by that the solder ball124is connected to the upper surface of the pillar-shaped electrodes144of the semiconductor structure131. And the optical sensor module110composed of the optical sensor111and the semiconductor structure131is mounted on the circuit board201by that the solder ball143of the semiconductor structure131is connected to the connection pad203of the circuit board201.

On the upper surface of the sealing film145of the semiconductor structure131around the optical sensor111, a lens holder151is situated. To the lens holder151, a holding cylinder153for holding a lens152situated above the photoelectric conversion device area113of the optical sensor111is attached in a manner that the holding cylinder153can rotate. In the lens holder151, between the optical sensor111and the lens152, an infrared ray absorption filter154is situated.

Next, an example of a manufacturing method of the optical sensor module110composed of the optical sensor111and the semiconductor structure131is explained. First, an example of a manufacturing method of the optical sensor111is explained. First, as shown inFIG. 30, a partially formed item, in which on the upper surface of a holding plate161composed of an ultraviolet ray transmitting glass plate, a transparent metal plate, a transparent resin plate, etc.; an adhesive layer162whose adhesive strength is lowered by radiating ultraviolet rays is situated, is prepared.

Next, at a plurality of predetermined positions of the upper surface of the adhesive layer162, the lower surface of the silicon substrate112is glued. In this case, on the silicon substrate112, a photoelectric conversion device area113, a connection pad114made of an aluminum type metal, etc., a protection film115made of silicon oxide, etc. are formed, and the center part of the connection pad114is exposed via opening parts116formed in the protection film115.

Next, as shown inFIG. 31, on the upper surface of the adhesive layer162including the protection film115, by a screen printing method, a spin coating method, etc., an insulation layer117made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, at a part of the insulation layer117corresponding to the opening parts116in the protection film115, an opening part119is formed. And at a predetermined position of the insulation layer117formed outside the side surface of the silicon substrate112, a through hole120is formed.

Next, as shown inFIG. 32, on the upper surface of the connection pad114exposed via both of the opening parts116and119, and on the entire upper surface of the insulation layer117including the upper surface of the adhesive layer162exposed via the through hole120, a bedding metal layer121is formed. In this case, the bedding metal layer121can be only a copper layer formed by electroless plating, or only a copper layer formed by sputtering, further a material in which a copper layer is formed by sputtering on a thin film layer of titanium, etc. formed by sputtering.

Next, on the upper surface of the bedding metal layer121, a plating resist film163is formed by pattering. In this case, at a part of the plating resist film163corresponding to the region forming wiring122, an opening part164is formed. Next, by executing copper electro plating by using the bedding metal layer121as a plating current route, on the upper surface of the bedding metal layer121in the opening part164of the plating resist film163, the wiring122is formed.

Next, the plating resist film163is removed, and when unnecessary parts of the bedding metal layer121were removed by etching by using the wiring122as a mask, as shown in FIG.33, the bedding metal layer121remains only under the wiring122. And in this state, in the through hole120, a penetrating electrode123composed of a bedding metal layer123aand a copper layer123bis formed.

Next, as shown inFIG. 34, at a part of the insulation layer117corresponding to the photoelectric conversion device area113, an opening part118is formed by a photo lithography method. In this, the opening part118can be formed at the process shown inFIG. 31. Next, the adhesive strength of the adhesive layer162is lowered by radiating ultraviolet rays from the lower surface side of the holding plate161, and when the holding plate161and the adhesive layer162were removed, one shown inFIG. 35is obtained.

In this state, the level of the lower surface of the insulation layer117formed outside the side surface of the silicon substrate112and the level of the lower surface of the penetrating electrode123formed in the through hole120are the same level of the lower surface of the silicon substrate112. Next, in case that an adhesive is on the lower surface of the penetrating electrode123formed in the through hole120, the adhesive is removed by plasma etching, etc.

Next, as shown inFIG. 36, on the lower surface of the penetrating electrode123formed in the through hole120, as older ball124is formed. Next, as shown inFIG. 37, when the insulation layer117was cut between the silicon substrate112adjacent to each other, as shown inFIG. 29, a plurality of optical sensors111(inFIG. 1, optical sensor35) having the penetrating electrode123outside the side surface of the silicon substrate112can be obtained.

Next, an example of a manufacturing method of the semiconductor structure131is explained. First, as shown inFIG. 38, a partially formed item, in which on the upper surface of a holding plate171composed of an ultraviolet ray transmitting glass plate, a transparent metal plate, a transparent resin plate, etc.; an adhesive layer172whose adhesive strength is lowered by radiating ultraviolet rays is situated, is prepared. In this, inFIG. 38, the region shown by the reference number173is a region corresponding to the dicing line.

Next, at a plurality of predetermined positions of the upper surface of the adhesive layer172, the lower surface of the silicon substrate132is glued. In this case, on the silicon substrate132, an integrated circuit, a connection pad134made of an aluminum type metal, etc., a protection film135made of silicon oxide, etc. are formed, and the center part of the connection pad134is exposed via an opening part136formed in the protection film.135.

Next, as shown inFIG. 39, on the upper surface of the adhesive layer172including the protection film135, by a screen printing method, a spin coating method, etc., an insulation layer137made of an epoxy type resin, a polyimide type resin, etc. is formed. In this case, at a part of the insulation layer137corresponding to the opening part136in the protection film135, an opening part138is formed. And at a predetermined position of the insulation layer137formed outside the side surface of the silicon substrate132, a through hole139is formed. Further, in the insulation layers137and at both side regions of the dicing lines173, through holes174are formed.

Next, as shown inFIG. 40, on the upper surface of the connection pads134exposed via both of the opening parts136and138, and on the entire upper surface of the insulation layer137including the upper surface of the adhesive layer172exposed via the through holes139and174, a bedding metal layer140is formed by copper electroless plating, etc. Next, on the upper surface of the bedding metal layer140, patterning forms a plating resist film175. In this case, at a part of the plating resist film175corresponding to the region forming wiring141, an opening part176is formed. Next, by executing copper electro plating by using the bedding metal layer140as a plating current route, on the upper surface of the bedding metal layer140in the opening part176of the plating resist film175, the wiring141is formed. Next, the plating resist film175is removed.

Next, as shown inFIG. 41, on the upper surface of the bedding metal layer140including the wiring141, a plating resist film177is formed by patterning. In this case, at a part of the plating resist film177corresponding to the region forming pillar-shaped electrodes144, an opening part178is formed. Next, by executing copper electro plating by using the bedding metal layer140as a plating current route, on the upper surface of the connection pad part of the wiring141in the opening part178of the plating resist film177, the pillar-shaped electrodes144are formed.

Next, the plating resist film177is removed, and when unnecessary parts of the bedding metal layer140were removed by etching by using the wiring141as a mask, as shown inFIG. 42, the bedding metal layer140remains only under the wiring141. And in this state, a penetrating electrode142composed of a bedding metal layer142aand a copper layer142bis formed in the through hole139.

Next, as shown inFIG. 43, by a screen printing method, a spin coating method, a die coating method, etc., on the entire upper surface of the protection film135including the pillar-shaped electrode144and the wiring141, and on the upper surface of the adhesive layer172exposed via the through hole174, a sealing film145made of an epoxy type resin, a polyimide type resin, etc. is formed in a manner that the thickness of the sealing film145is thicker than the height of the pillar-shaped electrodes144. Therefore, in this state, the upper surface of the pillar-shaped electrodes144are covered with the sealing film145.

Next, the upper surface sides of the sealing film145and the pillar-shaped electrode144are properly polished, and as shown inFIG. 44, the upper surface of the pillar-shaped electrodes144is exposed, and the upper surface of the sealing film145including the upper surface of the exposed pillar-shaped electrodes144are flattened. In this, the reason why the upper surface side of the pillar-shaped electrodes144are properly polished is, there is dispersion in the height of the pillar-shaped electrodes144formed by electro plating, to get rid of this dispersion, and to make the height of the pillar-shaped electrodes144uniform.

Next, the adhesive strength of the adhesive layer172is lowered by radiating ultraviolet rays from the lower surface side of the holding plate171, and when the holding plate171and the adhesive layer172were removed, one shown inFIG. 45is obtained. In this state, the level of the lower surface of the insulation layer137formed outside the side surface of the silicon substrate132, the level of the lower surface of the penetrating electrode142formed in the through hole139and the level of the lower surface of the sealing film145formed in the through hole174are the same level of the lower surface of the silicon substrate132. Next, in case that an adhesive is on the lower surface of the penetrating electrode142formed in the through hole139, the adhesive is removed by plasma etching, etc.

Next, as shown inFIG. 46, on the lower surface of the penetrating electrode142formed in the through hole139, as older ball143is formed. Next, as shown inFIG. 47, when the sealing film145between the silicon substrates132adjacent to each other was cut along the dicing lines173, as shown inFIG. 29, a plurality of semiconductor structures131having the penetrating electrodes142outside the side surfaces of the silicon substrate132are obtained.

And when the explanation is performed by referring toFIG. 29, the solder balls143of the semiconductor structure131is positioned on the connection pads203of the circuit board201, and the solder balls124of the optical sensor111are positioned on the pillar-shaped electrodes144of the semiconductor structure131, next, the solder balls143of the semiconductor structure131are bonded to the connection pads203of the circuit board201by reflow, and the solder balls124of the optical sensor111are bonded on the upper surfaces of the pillar-shaped electrodes144of the semiconductor structure131by reflow, with this, the optical sensor module110composed of the optical sensor111and the semiconductor structure131is mounted on the circuit board201.

As mentioned above, the optical sensor111having the photoelectric conversion device area113in its upper surface is, via the solder balls124situated under the penetrating electrodes123formed on its lower surface, mounted on the semiconductor structure131having the function as the peripheral drive circuit of the optical sensor111. Therefore, even the photoelectric conversion device area113and the connection pads114connected to the photoelectric conversion device area113are provided in the upper surface of the optical sensor111, the mounting can be executed without using bonding wires or a flexible wiring board, consequently, the optical sensor111can be mounted easily.

And also, the semiconductor structure131is, via the solder balls143formed under the penetrating electrodes142situated in its lower surface, mounted on the circuit board201, therefore, the mounting can be executed without using bonding wires or a flexible wiring board, consequently, the semiconductor structure131can be also mounted easily.

In this, it is possible that the semiconductor structure131is mounted on the circuit board201, and next, the optical sensor111is mounted on the semiconductor structure131. Further, it is possible that the optical sensor111is mounted on the semiconductor structure131, and next, the optical sensor module110composed of the optical sensor111and the semiconductor structure131is mounted on the circuit board201.

And at the above-mentioned embodiment, as shown inFIG. 47, the sealing film145is cut along the dicing lines173, and each of the semiconductor structure131is separated, however, the embodiment is not limited to this. For example, after the process shown inFIG. 46, as shown inFIG. 48, the solder balls124of the optical sensor111which is made one piece are bonded to the corresponding pillar-shaped electrodes144, next, as shown inFIG. 49, the sealing film145is cut along the dicing lines173, and each of the semiconductor structures131are separated. This is also possible.

And in the above-mentioned embodiment, for example, as shown inFIG. 37, the solder balls124are formed on the lower surface of the optical sensor111. However, the solder balls may also be formed on both surface sides of the semiconductor structure131, without forming the solder balls124on the lower surface of the optical sensor111. In other words, after the process shown inFIG. 45, the solder balls143are formed below the penetrating electrodes142, and the solder balls124are formed on the pillar-shaped electrodes144. This state is shown inFIG. 50. And without forming the solder balls143on the lower surface of the semiconductor structure131, for example, solder layers can be formed on the connection pads203of the circuit board201. Further, either one or both of the bonding of the optical sensor111and the semiconductor structure131, and the bonding of the semiconductor structure131and the circuit board201, can be executed by using an anisotropic conductive adhesive in which conductive particles are mixed in a thermosetting resin, or a conductive adhesive, by not using solder balls.

And the semiconductor structure131is explained in a case that the optical sensor111is mounted on the semiconductor structure131in a state that the main surface on which the integrated circuit133formed was directed in the upper side, however, the optical sensor111can be mounted on the semiconductor structure131in a state that the surface on which the integrated circuit133was formed is directed in the lower side. That is, the optical sensor111and the semiconductor structure131shown in the fifth embodiment can be applied to the second embodiment shown inFIG. 2.

In this case, the optical sensor35shown inFIG. 2can be mounted on the semiconductor structure131. And the optical sensor111shown in the fifth embodiment can be mounted on the semiconductor structure5shown inFIG. 2.

And also, at the fifth embodiment, as shown in the first embodiment, only the pillar-shaped electrodes144can be situated at the upper surface side of the silicon substrate132, without forming the penetrating electrodes142in the semiconductor structure131. In this case, as an example, the pillar-shaped electrodes144connecting to the flexible wiring plate29can be connected to the wiring22of the flexible wiring plate29by forming wiring extending on the insulation layer37.

And at the above-mentioned embodiment, as shown inFIG. 30andFIG. 38, the configuration, in which on the upper surface of the holding plate161(171) composed of the ultraviolet ray transmitting glass plate, the transparent metal plate, the transparent resin plate, etc.; the adhesive layer162(172) whose adhesive strength is lowered by radiating ultraviolet rays is situated, is used, however, the embodiment is not limited to this. For example, as the holding plate161(171), copper foil is used, and as the adhesive layer162(172), a material made of a die bonding material is used, and these are removed by etching, polishing, etc., this is also possible.

Further, at the above-mentioned embodiment, the semiconductor structure131, in which the pillar-shaped electrodes144were formed on its upper surface side, is used, however, the embodiment is not limited to this. As the semiconductor structure131, a configuration in which the pillar-shaped electrodes144and the sealing film145are not provided; the wiring141having the connection pad part is provided as the electrodes for connecting to an external device; and an overcoat film covering the connection pad part of the wiring141is provided, can be used.