Solid-state imaging device and method for manufacturing the same
View Patent ↗A solid-state imaging device comprises a housing in which a base and ribs forming a rectangular frame are formed in one piece by a resin; a plurality of metal lead pieces embedded in the housing, each of which has an internal terminal portion facing an internal space of the housing and an external terminal portion exposed at an outer portion of the housing; an imaging element arranged on the base in the internal space of the housing; connecting members connecting electrodes of the imaging element to the internal terminal portions of the metal lead pieces; and a transparent plate fastened to an upper face of the ribs. The upper face of the ribs is provided with a lower step portion that is lowered along an external periphery, and the transparent plate is fastened to the upper face of the ribs by an adhesive filled at least into the lower step portion. The joint between the ribs and the transparent plate has a cushioning effect with respect to stress caused by thermal deformation and the like, improving durability.
1. A method for manufacturing a solid-state imaging device, comprising: resin-molding a housing including a base and rectangular frame-shaped ribs in one piece with a plurality of metal lead pieces, forming internal terminal portions and external terminal portions with the metal lead pieces; fixing an imaging element onto the base inside an internal space of the housing; connecting electrodes of the imaging element respectively to the inner terminal portions of the metal lead pieces; and fixing a transparent plate to an upper face of the ribs, wherein
a plurality of the housings are molded together with a plurality of the metal lead pieces being arranged respectively, so that rib forming members are formed with the ribs for forming adjacent housings combined into a single rib, and a groove portion is provided on the upper face of the rib forming members in the center in the width direction so as to extend in a longitudinal direction,
after the imaging element is arranged inside the internal space of each housing, the electrodes of the imaging element are connected to the internal terminal portions with connecting members,
then, after an adhesive is provided on a top face of the rib forming members including the groove, a transparent plate is placed on and joined to the adhesive on the upper face of the rib forming members, and
then, each housing is cut inside the groove in a direction which is perpendicular to the base and which divides a width of the rib forming members into two, separating the solid-state imaging devices into individual pieces.
2. The method for manufacturing a solid-state imaging device according to claim 1 , wherein
a lead frame is used that is formed such that it includes a plurality of lead portions for forming the plurality of lead pieces, and that its thickness at a position corresponding to the internal terminal portions of the lead portions is substantially the same as a thickness of the base, and
the lead frame is mounted such that a portion corresponding to the inner terminal portions of the lead portions is clamped between a lower resin molding die and a portion of an upper resin molding die forming the inner space of the housing, thus resin molding the housing.
3. The method for manufacturing a solid-state imaging device according to claim 1 , wherein
a transparent plate of a size covering a plurality of housings is placed onto the upper face of the rib forming members when fastening the transparent plate, and
the transparent plate is cut together when cutting the rib forming members into individual housings.
4. The method for manufacturing a solid-state imaging device according to claim 1 , wherein, when fastening the transparent plate, individual transparent plates are placed on the respective housings such that gaps are formed between edges of adjacent transparent plates above the grooves in the rib forming members, and the solid-state imaging devices are separated in the gap region.