Solid-state imaging device with molded resin ribs and method of manufacturing

• US 7,202,469 B2
• Filed: 10/21/2004
• Issued: 04/10/2007
• Est. Priority Date: 10/23/2003
• Status: Active Grant

• Current Assignee: Panasonic Semiconductor Solutions Co., Ltd. (Winbond Electronics Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Minamio, Masanori, Shimizu, Katsutoshi, Yamauchi, Kouichi
• Primary Examiner(s): Luu; Thanh X.
• Application Number:
  US10/970,533
• Publication Number:
  US 20050109926A1
• Time in Patent Office: 901 Days
• Field of Search: 250/239, 257/433, 257/434, 257/676, 438/64, 438/65
• US Class Current: 250/239
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• 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 2924/00014 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

Abstract

A solid-state imaging device includes a wiring board composed of an insulating resin, frame-shaped ribs arranged on the wiring board, a transparent plate arranged on an upper surface of the ribs, a plurality of wiring members that electrically lead from an internal space of a case formed by the wiring board and the ribs to the outside, an imaging element fixed on the wiring board within the internal space, and connecting members which connect electrodes of the imaging element and the wiring members. The ribs are formed by resin molding directly onto a face of the transparent plate, and a lower surface of the ribs is fixed to the wiring board with an adhesive. The package is configured without adhesive interposed between the ribs and the transparent sealing plate, thereby reducing the effect on incident light.

Claims

1. A solid-state imaging device comprising:

an integrated member composed of a transparent plate and ribs made of a material different from that of the transparent plate, in which an upper surface of the ribs is resin molded onto the transparent plate;

a wiring board fixed to a lower surface of the ribs;

a plurality of wiring members that electrically lead from an internal space of a case formed by the wiring board and the ribs to the outside;

an imaging element fixed on the wiring board within the internal space; and

connecting members that connect electrodes of the imaging element and the wiring members.

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

wherein an end face of the wiring board, an external lateral face of the ribs and an end face of the transparent plate form a flush.

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

wherein an internal lateral face of the ribs is inclined such that a width of the ribs becomes smaller on the wiring board side.

4. The solid-state imaging device according to claim 3,

wherein an inclination angle of the ribs is in a range of 2 to 12°

with respect to a direction perpendicular to a surface of the wiring board.

5. The solid-stale imaging device according to claim 1,

wherein each of the wiring members is composed of an internal electrode formed inside the case, an external electrode fanned outside the case, and an end face electrode connecting the internal electrode with the external electrode, and

the surface of the end face electrode is from flush with the end face of the wiring board.

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

wherein each of the wiring members is composed of an internal electrode formed inside the case, an external electrode formed outside the case, and an end face electrode connecting the internal electrode with the external electrode, and

the surface of the end face electrode is indented from the end face of the wiring board.

7. The solid-state imaging device according to claim 1, wherein the lower surface of the ribs is fixed to the wiring board with an adhesive.

8. The solid-state imaging device according to claim 1, wherein the integrated member is devoid of adhesive between the ribs and the transparent plate.

9. The solid-state imaging device according to claim 1, wherein an internal lateral face of each rib is matted to suppress reflections by the internal lateral faces of the ribs.

10. A method for manufacturing a solid-state imaging device comprising a wiring board composed of an insulating resin, frame-shaped ribs arranged on the wiring board, a transparent plate arranged on an upper surface of the ribs, a plurality of wiring members that electrically lead from an internal space of a case form by the wiring board and the ribs to the outside, an imaging element fixed on the wiring board within the internal space, and connecting members that connect electrodes of the imaging element and the wiring members, the method comprising:

resin molding rib forming members made of a material different from that of the transparent plate for forming a plurality of the ribs constituting a plurality of the solid-state imaging devices onto a face of the transparent plate having a region corresponding to the plurality of the solid-state imaging devices;

using a wiring board member in which a plurality of the wiring members are arranged in regions corresponding to a plurality of wiring boards, and fixing imaging elements inside the regions corresponding to the respective wiring boards and connecting the electrodes of the imaging elements and the wiring members by the connecting members;

fixing the rib forming members to the surface of the wiring board member using an adhesive, with the rib forming members facing the wiring board member and the transparent plate opposing the wiring board member such that the imaging elements are arranged within frames formed by the rib forming members; and

separating the solid-state imaging devices into pieces by cutting the wiring board member, the rib forming members and the transparent plate.

11. The method for manufacturing a solid-state imaging device according to claim 10,

wherein the rib forming members are formed into a lattice shape, and when cutting the wiring board member and the transparent plate, the rib forming members are cut in such a direction that a width of the rib forming members is divided into two.

12. The method for manufacturing a solid-state imaging device according to claim 11,

wherein, when resin molding the rib forming members on the face of the transparent plate, a lateral face of the rib forming members is formed with an inclination, such that the width of the rib forming members becomes smaller with increased distance from the face of the transparent plate.

13. The method for manufacturing a solid-state imaging device according to claim 10, wherein an internal lateral face of each rib is matted to suppress reflections by the internal lateral faces of the ribs.