Image pickup apparatus and endoscope including image pickup apparatus
An image pickup apparatus includes a substrate, on a first surface of which a light receiving section and a peripheral circuit section are formed, a multilayer wiring layer stacked on the first surface and including a plurality of metal layers and insulating layers, a translucent cover located on the multilayer wiring layer, and a side surface sealing member which extends from a peripheral section of a surface in the translucent cover to the substrate side while having a frame shape, and protects outer peripheral side surfaces of the multilayer wiring layer.
1. An image pickup apparatus comprising:
a substrate, on a principal plane of which a light receiving section and a peripheral circuit section are formed;
a multilayer wiring layer stacked on the principal plane of the substrate, the multilayer wiring layer including a plurality of metal layers electrically connected to the light receiving section and to the peripheral circuit section, the multilayer wiring layer further having insulating layers for insulating the metal layers, the multilayer wiring layer being formed to cover at least the light receiving section and the peripheral circuit section in a plan view of the principal plane, and the multilayer wiring layer having an external shape smaller than an external shape of the substrate to define a non-formation region on the principal plane of the substrate where the multilayer wiring layer is not stacked on the principal plane of the substrate;
a translucent cover, which is a glass substrate, located on the multilayer wiring layer, the translucent cover being formed in an external shape larger than the external shape of the multilayer wiring layer and formed in at least a same size as the external shape of the substrate in the plan view; and
a side surface sealing member disposed in the non-formation region, the side surface sealing member water-tightly contacting with at least the principal plane of the substrate in the non-formation region to prevent moisture from intruding into the multilayer wiring layer,
wherein the light receiving section is positioned on the substrate such that light transmitted through the translucent cover is incident on the light receiving section.
2. The image pickup apparatus according to claim 1 , further comprising an adhesive for adhering the translucent cover on the multilayer wiring layer, the adhesive being disposed on a part on the multilayer wiring layer or is located apart from the multilayer wiring layer.
3. The image pickup apparatus according to claim 2 , wherein the side surface sealing member is configured from an inorganic material.
4. The image pickup apparatus according to claim 3 , wherein
the translucent cover is configured from the inorganic material, and
the side surface sealing member is formed integrally with the translucent cover.
5. The image pickup apparatus according to claim 2 , wherein the side surface sealing member is configured from a resin material.
6. The image pickup apparatus according to claim 5 , wherein
the adhesive comprises the resin material and the translucent cover is adhered on the multilayer wiring layer by the resin material.
7. The image pickup apparatus according to claim 2 , wherein
the translucent cover is located apart from the multilayer wiring layer, and
the translucent cover having a gap formed between a surface of the multilayer wiring layer and a surface of the translucent cover.
8. The image pickup apparatus according to claim 6 , wherein
the translucent cover is stuck on the multilayer wiring layer by applying the adhesive on the multilayer wiring layer to non-overlapping regions the non-overlapping regions being regions on the multilayer wiring layer that do not overlap with the light receiving section in the plan view, and
the translucent cover having a gap formed between a surface of the multilayer wiring layer and a surface of the translucent cover, a region overlapping the light receiving section being a region on the multilayer wiring layer that overlaps with the light receiving layer in the plan view.
9. The image pickup apparatus according to claim 1 , wherein the insulating layers are configured from a Low-k insulating film.
10. An endoscope comprising the image pickup apparatus according to claim 1 .
11. The image pickup apparatus according to claim 1 , wherein the side surface sealing member having a frame shape corresponding to an outer peripheral side surface of the multilayer wiring layer.