Solid-state imaging device and method for producing the same

• US 20040212717A1
• Filed: 09/30/2003
• Published: 10/28/2004
• Est. Priority Date: 04/28/2003
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Minamio, Masanori, Yamauchi, Kouichi
• Granted Patent: US 7,273,765 B2
• Time in Patent Office: Days
• US Class Current: 348/340
• CPC Class Codes: H01L 2224/32225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2224/97 the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
• CPC Class Codes: H01L 24/97 the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
• CPC Class Codes: H01L 27/14618 Containers
• CPC Class Codes: H01L 27/14683 Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof not peculiar thereto H01L21/00
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/16195 Flat cap [not enclosing an internal cavity]

Abstract

A solid-state imaging device includes: a planar substrate; an imaging element fixed onto the substrate; a rib provided on the substrate so as to surround the imaging element; a transparent plate fixed to a top face of the rib; a plurality of wirings for conducting electricity from inside of a package to outside of the same, the package being composed of the substrate, the rib and the transparent plate; and thin metal wires for connecting electrodes of the imaging element with the respective wirings. Each of the wirings includes: an internal electrode disposed on a surface with the imaging element mounted thereon; an external electrode disposed on a rear surface of the imaging-element mounted surface and at a position corresponding to the internal electrode and an end face electrode disposed on an end face of the substrate, for connecting the internal electrode and the external electrode. An end face of the substrate, a side face of the rib and an end face of the transparent plate form a substantially coplanar surface. The structure of the substrate having an external terminal is simple, thus facilitating the miniaturization of the device.

Claims

1. A solid-state imaging device, comprising:

a substrate with a flat board form that is made of an insulating resin;

an imaging element that is fixed onto the substrate;

a rib with a rectangular frame form in a planar shape, which is provided on the substrate so as to surround the imaging element;

a transparent plate that is fixed to a top face of the rib;

a plurality of wirings for conducting electricity from inside of a package to outside of the package, the package being comprised of the substrate, the rib and the transparent plate; and

thin metal wires provided in a space within the package, which connect electrodes of the imaging element with the respective wirings,

wherein each of the plurality of wirings includes;

an internal electrode disposed on a surface with the imaging element mounted thereon;

an external electrode disposed on a rear surface of the imaging-element mounted surface and at a position corresponding to the internal electrode; and

an end face electrode disposed on an end face of the substrate, which connects the internal electrode and the external electrode, and

an end face of the substrate, a side face of the rib and an end face of the transparent plate, which correspond to a side face of the package, form a substantially coplanar surface.

2. The solid-state imaging device according to claim 1, wherein the end face of the substrate, the side face of the rib and the end face of the transparent plate are in a plane formed by cutting them sequentially in a single operation.

3. The solid-state imaging device according to claim 1, wherein an internal side face of the rib has a tilt such that the internal side face spreads outwardly from a face of the substrate toward the transparent plate.

4. The solid-state imaging device according to claim 3, wherein the internal side face of the rib has a flat surface, and an angle of the tilt is within a range of 20 to 12°

with respect to a direction perpendicular to the face of the substrate.

5. The solid-state imaging device according to claim 1, wherein an orange peel skin pattern or a grained pattern is formed on an internal side face of the rib.

6. The solid-state imaging device according to claim 1, wherein an internal side face of the rib has a flat surface, and an external side face and the internal side face of the rib are perpendicular to the face of the substrate.

7. The solid-state imaging device according to claim 1,

wherein the end face electrode is disposed in a recess that is formed on the end face of the substrate, and

a surface of the end face electrode forms a substantially coplanar face with the end face of the substrate, or is recessed relative to the end face of the substrate.

8. The solid-state imaging device according to claim 1, wherein a surface of the external electrode forms a substantially coplanar surface with the rear surface of the substrate.

9. The solid-state imaging device according to claim 1, wherein a surface of the external electrode is recessed relative to the rear surface of the substrate.

10. The solid-state imaging device according to claim 9,

wherein an insulation film is formed on the rear face of the substrate, and

the insulation film and the external electrode are arranged so as not to overlap each other.

11. The solid-state imaging device according to claim 9,

wherein an insulation film is formed on the rear face of the substrate, and

a peripheral portion of the external electrode and the insulation film are arranged so as to overlap each other.

12. A method for producing the solid-state imaging device according to claim 1, comprising the steps of:

forming a top-side conductive layer and a bottom-side conductive layer on a top face and a bottom face of a base material with a flat board form that is made of an insulation resin so that the top-side conductive layer and the bottom-side conductive layer correspond to a plurality of groups of the wirings for composing a plurality of the solid-state imaging devices, and forming a perforation conductive layer that penetrates through the base material so as to connect the top-side conductive layer and the bottom-side conductive layer;

providing a rib formation member for forming the rib on the base material at a boundary between regions, each of which is for forming one of the plurality of solid-state imaging devices, so that the rib formation member extends transversely with respect to the top-side conductive layer above the perforation conductive layer;

fixing the imaging element in each region surrounded by the rib formation member and connecting the electrode of the imaging element and the top-side conductive layer by means of the thin metal wire;

fixing the transparent plate to a top end face of the rib formation member; and

cutting the base material, the rib formation member and the transparent plate sequentially in a single operation in a direction perpendicular to the base material and in a direction that divides a width in a planar shape of the rib formation member into halves so as to separate the plurality of solid-state imaging devices into the respective pieces.

13. The method for producing the solid-state imaging device according to claim 12, wherein the rib formation member is formed in a lattice form.

14. The method for producing the solid-state imaging device according to claim 12, wherein the rib formation member is formed on the base material by resin forming.

15. The method for producing the solid-state imaging device according to claim 14, wherein the resin forming is carried out by molding using molds.

16. The method for producing the solid-state imaging device according to claim 15, wherein, when forming the rib formation member by the resin molding, a sheet for suppressing generation of the resin flash is interposed between a mold for the resin molding and the base material.