Solid-state image-taking apparatus to focus incoming light into an image, manufacturing method thereof, and camera
View Patent ↗A solid-state image-taking apparatus which have a solid-state image-taking device includes a chip of the solid-state image-taking device, an imaging lens configured to focus incoming light into an image on the solid-state image-taking device, and a material of a refraction index larger than 1, which is arranged between the chip and the imaging lens.
1. A method of manufacturing a solid-state image-taking apparatus comprising:
placing an imaging lens configured to focus incoming light into an image on a chip of the solid-state image-taking apparatus; and
forming a material having a refraction index larger than 1, between the chip and the imaging lens, and the material having the refraction index larger than 1 is formed such that it has a depth that is larger than or equal to a focal depth of the imaging lens.
2. The method of manufacturing a solid-state image-taking apparatus according to claim 1 , wherein the material of a refraction index larger than 1 is configured to be laminated on an uppermost layer of the chip.
3. The method of manufacturing a solid-state image-taking apparatus according to claim 1 , wherein the material of a refraction index larger than 1 is configured to occupy all whole of a space between the chip and the imaging lens.
4. The method of manufacturing a solid-state image-taking apparatus according to claim 1 , wherein the material of a refraction index larger than 1 is configured to include an optical part having a planer portion and a convex curved-surface-shaped portion, and the convex curved-surface-shaped portion of the optical part is configured to be contacted with the surface chip.
5. The method of manufacturing a solid-state image-taking apparatus according to claim 4 , wherein a width of a contact portion between the convex curved-surface-shaped portion of the optical part and the highest layer of the chip is less than or equal to 800 nm.
6. The method of manufacturing a solid-state image-taking apparatus according to claim 4 , further comprising:
a waveguide path which is formed between the convex curved-surface-shaped portion of the optical part and a light receiver included in each of pixels of the solid-state image-taking device.
7. The method of manufacturing a solid-state image-taking apparatus according to claim 1 , wherein the material of a refraction index larger than 1 has an Abbe number larger than or equal to 50.
8. The method of manufacturing a solid-state image-taking apparatus according to claim 1 , wherein a plurality of materials having wavelengths different from one another are provided as the material of a refraction index larger than 1.
9. The solid-state image-taking apparatus according to claim 1 , wherein a reflection prevention film is provided on a surface of the imaging lens side of the material of a refraction index larger than 1, and the reflection prevention film has a refraction index of an intermediate value between 1 and a refraction index of the material of a refraction index larger than 1.
10. A manufacturing method of a solid-state image-taking apparatus including a chip of a solid-state image-taking device and an imaging lens configured to focus incoming light into an image on the solid-state image-taking device, the manufacturing method comprising:
forming a material of a refraction index larger than 1 between the chip and the imaging lens, and the material having the refraction index larger than 1 is formed such that it has a depth that is larger than or equal to a focal depth of the imaging lens.
11. The manufacturing method of a solid-state image-taking apparatus, according to claim 10 , wherein an optical part is produced by molding the material of a refraction index larger than 1, and the optical part is bonded with a surface of the chip.
12. A camera which includes a solid-state image-taking apparatus including a solid-state image-taking device and is used for taking an image, the camera comprising:
an imaging lens configured to focus incoming light into an image on a chip of the solid-state image-taking device; and
a material of a refraction index larger than 1, which is arranged between the chip and the imaging lens, wherein the material having the refraction index larger than 1 is arranged such that it has a depth that is larger than or equal to a focal depth of the imaging lens.