SEMICONDUCTOR PACKAGE, SEMICONDUCTOR DEVICE MANUFACTURING METHOD, AND SOLID-STATE IMAGING DEVICE

Abstract

A semiconductor package includes: a sheet-like thin plate on which a semiconductor chip is secured; and a substrate including a wiring layer, disposed on the thin plate to extend over a part of a region surrounding the region where the semiconductor chip is secured or over the entire surrounding region, wherein the semiconductor chip and the substrate are electrically connected.

Claims

1. A camera module, comprising: a metal plate; an image sensor disposed on the metal plate; a wiring substrate that includes a plurality of wiring layers; and a lens unit disposed on the wiring substrate, wherein the wiring substrate is disposed on the metal plate extends: over a part of a first region that surrounds a second region where the image sensor is secured, or entirely over the first region, wherein the image sensor and the wiring substrate are electrically connected, and wherein the wiring substrate includes a first edge and a second edge, and is disposed on the metal plate such that a width between the first edge and the second edge of the wiring substrate is equal to a width of the metal plate in a sectional view.

2. The camera module according to claim 1, wherein the lens unit is disposed above the metal plate such that a width of the lens unit is equal to the width between the first edge and the second edge of the wiring substrate.

3. The camera module according to claim 1, wherein the metal plate includes stainless steel, aluminum, or copper.

4. The camera module according to claim 1, wherein the metal plate and the wiring substrate are electrically connected.

5. The camera module according to claim 1, wherein a wiring layer of the plurality of wiring layers includes a plurality of wiring patterns.

6. The camera module according to claim 1, wherein the plurality of wiring layers is a multi-layer structure.

7. The camera module according to claim 1, wherein the image sensor comprises a plurality of pixels.

8. The camera module according to claim 1, wherein the image sensor is bonded to a surface of the metal plate by a bonding material, and wherein the bonding material is an insulating material.

9. The camera module according to claim 1, wherein the image sensor is bonded to a surface of the metal plate by a bonding material, and wherein the bonding material is a conductive material.

10. The camera module according to claim 1, wherein the metal plate has a thickness of 0.1 mm.

11. The camera module according to claim 1, wherein the image sensor is connected to the metal plate, and wherein the metal plate is connected to a ground potential.

12. The camera module according to claim 1, wherein the metal plate is electrically connected to the wiring substrate, and wherein the metal plate is connected to a ground potential.

13. An electronic apparatus, comprising: a camera module that comprises: a metal plate; an image sensor disposed on the metal plate; a wiring substrate that includes a plurality of wiring layers; and a lens unit disposed on the wiring substrate, wherein the wiring substrate is disposed on the metal plate extends: over a part of a first region that surrounds a second region where the image sensor is secured, or entirely over the first region, wherein the image sensor and the wiring substrate are electrically connected, and wherein the wiring substrate is disposed on the metal plate such that a width of the wiring substrate is equal to a width of the metal plate in a sectional view.

14. The electronic apparatus according to claim 13, wherein the lens unit is disposed above the metal plate such that a width of the lens unit is equal to the width of the wiring substrate.

15. The electronic apparatus according to claim 13, wherein the metal plate includes stainless steel, aluminum, or copper.

16. The electronic apparatus according to claim 13, wherein the metal plate and the wiring substrate are electrically connected.

17. The electronic apparatus according to claim 13, wherein a wiring layer of the plurality of wiring layers includes a plurality of wiring patterns.

18. The electronic apparatus according to claim 13, wherein the plurality of wiring layers is a multi-layer structure.

19. The electronic apparatus according to claim 13, wherein the image sensor comprises a plurality of pixels.

20. The electronic apparatus according to claim 13, wherein the image sensor is bonded to a surface of the metal plate by a bonding material, and wherein the bonding material is an insulating material.

21. The electronic apparatus according to claim 13, wherein the image sensor is bonded to a surface of the metal plate by a bonding material, and wherein the bonding material is a conductive material.

22. The electronic apparatus according to claim 13, wherein the metal plate has a thickness of about 0.1 mm.

23. The electronic apparatus according to claim 13, wherein the image sensor is connected to the metal plate, and wherein the metal plate is connected to a ground potential.

24. The electronic apparatus according to claim 13, wherein the metal plate is electrically connected to the wiring substrate, and wherein the metal plate is connected to a ground potential.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a sectional view of a camera module according to the related art;

[0024] FIG. 2 is a sectional view of a camera module to which the present disclosure is applied;

[0025] FIG. 3 is a flow chart for explaining a process of manufacturing a camera module; and

[0026] FIGS. 4A to 4E are illustrations showing steps for manufacturing a camera module.

DETAILED DESCRIPTION

[0027] An embodiment of the present disclosure will now be described with reference to the drawings. The following items will be described in the order listed.

1. Configuration of Camera Module

2. Steps of Manufacturing Camera Module

<1. Configuration of Camera Module>

[0028] FIG. 2 is a sectional view of an embodiment of the present disclosure, i.e., a camera module 51 which is a solid-state imaging device to which the present disclosure is applied.

[0029] The camera module 51 includes a thin plate 61, a wiring substrate 62, an image sensor 63, wires 64, and a lens unit 65.

[0030] For example, the thin plate 61 is constituted by sheet metal. Specifically, the thin plate 61 is formed of an SUS (steel use stainless) type metal or a metal having high thermal conductivity such as Al or Cu, and the plate has a thickness of about 0.1 mm. The thin plate 61 may be formed of one type of metal as thus described, and the plate may alternatively be formed by laminating an SUS metal and a metal having high thermal conductivity.

[0031] The image sensor 63 is secured on the thin plate 61 using die bonding. The wiring substrate 62 is disposed on the thin plate 61 around the region where the image sensor 63 is secured, and the substrate is secured to the plate so as to surround the image sensor 63. The wiring substrate 62 includes a wiring layer having a multi-layer structure, the wiring layer including a plurality of wiring patterns 62a. The wiring substrate 62 may be disposed throughout the region of the thin plate 61 surrounding the region where the image sensor 63 is secured, and the substrate may alternatively be disposed to cover only a part of the surrounding region.

[0032] The image sensor 63 has a light receiving surface 63a in which unit pixels each including a photoelectric conversion element (the unit pixels may hereinafter be simply referred to as pixels) are two-dimensionally arranged in the form of a matrix. The sensor detects the amount of electrical charge as a physical quantity generated at each pixel in accordance with the quantity of light incident on the light receiving surface 63a. The wiring substrate 62 and the image sensor 63 are electrically connected through the wires 64 using wire bonding.

[0033] The lens unit 65 is formed by a lens 65a and a support portion 65b, and the support portion 65b supports the lens 65a above the wiring substrate 62, the lens 65a allowing light to impinge on the light receiving surface 63a of the image sensor 63.

[0034] In such a camera module 51, the range from the light receiving surface 63a of the image sensor up to the top surface of the lens unit 65 constitutes a lens design factor, and the range from the light receiving surface 63a of the image sensor 63 down to the bottom surface of the thin plate 61 constitutes a package design factor, i.e., an image sensor package.

<2. Steps of Manufacturing Camera Module>

[0035] Steps for manufacturing a camera module 51 will now be described with reference to FIG. 3 and FIGS. 4A to 4E. FIG. 3 is a flow chart for explaining a flow of a process of manufacturing a camera module 51, and FIGS. 4A to 4E are illustrations showing steps for manufacturing the camera module 51.

[0036] At step S11, a thin plate 61 is provided as shown in FIG. 4A.

[0037] At step S12, a wiring substrate 62 is connected to the thin plate 61 as shown in FIG. 4B. At this time, the thin plate 61 and the wiring substrate 62 may be electrically connected after grounding the thin plate 61. Thus, the electrical characteristics and shielding performance of the wiring substrate 62 can be improved.

[0038] At step S13, an image sensor 63 is secured on the thin plate 61 using die bonding as shown in FIG. 4C.

[0039] The bonding material used for die bonding may be either material having insulating properties or conductive material. For example, when a material having insulating properties is used as the bonding material, insulation can be established between the thin plate 61 and a silicon substrate of the image sensor 63. When wire bonding is carried out using a conductive material as the bonding material after grounding the thin plate 61, the silicon substrate of the image sensor 63 may be grounded. Either material having insulating properties or conductive material may be used as the bonding material for die bonding depending on the characteristics of the image sensor 63 as thus described.

[0040] At step s14, the wiring substrate 62 and the image sensor 63 are electrically connected through wires 64 using wire bonding, as shown in FIG. 4D. Bonding methods other than wire bonding may be used as long as the wiring substrate 62 and the image sensor 63 are connected.

[0041] At step S15, a lens unit 65 is placed on the wiring substrate 62. Thus, a camera module 51 is completed.

[0042] In the configuration and process described above, the image sensor 63 is secured on the thin plate 61 having no wiring layer, and the wiring substrate 62 including a wiring layer is disposed around the image sensor 63. An image sensor package formed as thus described can be provided with a thickness which is smaller by an amount equivalent to the thickness of the wiring layer compared to the thickness of a package having an ordinary configuration according to the related art in which an image sensor is secured on a wiring substrate including a wiring layer. Consequently, a camera module having a small thickness can be provided.

[0043] Since the thin plate 61 is formed of a metal, the strength of the image sensor package can be sufficiently kept even if the package is provided with a small thickness.

[0044] Further, when the thin plate 61 is formed of an SUS type metal, an image sensor package having high rigidity can be provided without performing a rust-preventing process.

[0045] When the thin plate 61 is formed of a metal having high thermal conductivity such as Al or Cu, it is possible to provide an image sensor package which allows heat released by the image sensor 63 to be efficiently released from the bottom surface of the image sensor 63 to the outside through the thin plate 61.

[0046] Further, when the thin plate 61 is formed by laminating a layer of an SUS type metal and a layer of a metal having high thermal conductivity such as Al or Cu, an image sensor package having the above-described two advantages can be provided.

[0047] Since the thin plate 61 and the wiring substrate 62 are provided as separate elements, the thin plate 61 and the wiring substrate 62 can be formed using materials having characteristics appropriate for the respective purposes of the elements. Specifically, characteristics desirable for the wiring substrate 62 can be obtained by using a substrate according to the related art such as a ceramic substrate or organic substrate as the wiring substrate. The thin plate 61 may be made of a material which provides high strength or rigidity even if it has a small thickness. Thus, the plate can be provided with strength or rigidity at a level hard to achieve with a ceramic material or organic material which is optimal as the material of the wiring substrate.

[0048] According to the above description, the thin plate 61 is formed of a metal. Alternatively, the plate may be formed of a non-metal material as long as sufficient strength or rigidity can be obtained.

[0049] While an exemplary application of the present disclosure to an image sensor package has been described, the present disclosure may be applied to a semiconductor package formed by packaging a predetermined semiconductor chip. Specifically, the present disclosure allows a semiconductor package to be provided with a small thickness, which consequently makes it possible to provide a semiconductor device (semiconductor module) including such a semiconductor package with a small thickness.

[0050] The present disclosure is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present disclosure.

The present disclosure may be implemented as the configurations described below.

[0051] (1) A semiconductor package including:

a sheet-like thin plate on which a semiconductor chip is secured; and
a substrate including a wiring layer, disposed on the thin plate to extend over a part of a region surrounding the region where the semiconductor chip is secured or over the entire surrounding region, wherein
the semiconductor chip and the substrate are electrically connected.

[0052] (2) The semiconductor package according to the item (1), wherein the thin plate may be formed of a metal.

[0053] (3) The semiconductor package according to the item (2), wherein the thin plate may be formed of stainless steel.

[0054] (4) The semiconductor package according to the item (2), wherein the thin plate may be formed of a metal having high thermal conductivity.

[0055] (5) The semiconductor package according to the item (2), wherein the thin plate may be formed by laminating a layer of stainless steel and a layer of a metal having high thermal conductivity.

[0056] (6) The semiconductor package according to any of the items (2) to (5), wherein the thin plate and the substrate may be electrically connected.

[0057] (7) A method of manufacturing a semiconductor device including:

securing a semiconductor chip on a sheet-like thin plate;
disposing a substrate including a wiring layer on the thin plate such that the substrate extends over a part of a region surrounding the region where the semiconductor chip is secured or over the entire surrounding region; and
electrically connecting the semiconductor chip and the wiring substrate.

[0058] (8) A solid-state imaging device including:

a lens;
an image sensor photo-electrically converting light collected by the lens;
a sheet-like thin plate on which the image sensor is secured; and
a substrate including a wiring layer, disposed on the thin plate to extend over a part of
a region surrounding the region where the image sensor is secured or over the entire surrounding region, wherein
the image sensor and the wiring substrate are electrically connected.
The present disclosure contains subject matter related to that disclosed in Japanese Priority Patent Application JP 2011-105993 filed in the Japan Patent Office on May 11, 2011, the entire content of which is hereby incorporated by reference.
It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.