Solid state imaging device having lens and material with refractive index greater than 1 between the lens and imaging chip

1. A solid-state image-taking apparatus which includes a solid-state image-taking device, the solid-state image-taking apparatus comprising:

a chip solid-state image-taking device;

an imaging lens configured to focus incoming light into an image on the chip 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 and is laminated on an uppermost layer of the chip, and the material of a refraction index larger than 1 has a depth that is larger than or equal to a focal depth of the imaging lens.

2. The solid-state image-taking apparatus according to claim 1 , wherein the material of a refraction index larger than 1 is configured to occupy the whole of a space between the chip and the imaging lens.

3. The 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 of the highest layer of the chip.

4. The solid-state image-taking apparatus according to claim 3 , wherein the 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.

5. The solid-state image-taking apparatus according to claim 3 , 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.

6. The solid-state image-taking apparatus according to any of claims 1 or 2 - 5 , wherein the material of a refraction index larger than 1 has an Abbe number larger than or equal to 50.

7. The solid-state image-taking apparatus according to any of claims 1 or 2 - 5 , wherein a plurality of materials having wavelengths different from one another are provided as the material of a refraction index larger than 1.

8. The solid-state image-taking apparatus according to claim 1 , wherein a reflection prevention film is provided on the 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.

9. 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 being laminated on an uppermost layer of the chip, and the material of a refraction index larger than 1 has a depth that is larger than or equal to a focal depth of the imaging lens.

10. The manufacturing method of a solid-state image-taking apparatus, according to claim 9 , wherein an optical part is produced by molding the material of a refraction index larger than 1, and the optical part is bonded with the surface of the highest layer of the chip.

11. 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:

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 and is laminated on an uppermost layer of the chip, and the material of a refraction index larger than 1 has a depth that is larger than or equal to a focal depth of the imaging lens.