Image capturing apparatus and manufacturing method thereof

• US 10,713,521 B2
• Filed: 09/29/2017
• Issued: 07/14/2020
• Est. Priority Date: 08/05/2016
• Status: Active Grant

• Current Assignee: Gingy Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: You, Kuo-Liang, Yang, Kuo-Wen, Huang, Cheng-Jyun, Chiu, Yu-Cheng, Chang, Hao-Hsiang, Yu, Chih-Chiang
• Primary Examiner(s): Bedtelyon, John
• Application Number:
  US15/719,575
• Publication Number:
  US 20180039849A1
• Time in Patent Office: 1,019 Days
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1329 Protecting the fingerprint sensor against damage caused by the finger
• CPC Class Codes: G06V 40/70 Multimodal biometrics, e.g. combining information from different biometric modalities

Abstract

An image capturing apparatus including a substrate, a light source, a sensor, a light shielding element, a first reflective element, and a transparent colloid curing layer is provided. The light source, the sensor, the light shielding element, the first reflective element, and the transparent colloid curing layer are disposed on the substrate. The sensor is located next to the light source. The light shielding element is located between the light source and the sensor. The first reflective element is located between the light shielding element and the sensor. The transparent colloid curing layer covers the light source, the sensor, the light shielding element, and the first reflective element. A manufacturing method of the image capturing apparatus is also provided.

Claims

1. An image capturing apparatus comprising:

a substrate;

a light source disposed on the substrate;

a sensor disposed on the substrate and located next to the light source;

a light shielding element disposed on the substrate and located between the light source and the sensor,

a first reflective element disposed on the substrate and located between the light shielding element and the sensor, and

a transparent colloid curing layer disposed on the substrate and covering the sensor, the light source, the light shielding element, and the first reflective element,

wherein the first reflective element and the sensor are not overlapped in a normal direction of the substrate.

2. The image capturing apparatus according to claim 1, wherein a pulse width modulation circuit is integrated in the sensor.

3. The image capturing apparatus according to claim 1, wherein a thickness of the transparent colloid curing layer is within a range from 0.3 mm to 1.8 mm.

4. The image capturing apparatus according to claim 1, further comprising:

a transparent cover disposed on the transparent colloid curing layer and covering the light source, the sensor, the light shielding element, and the first reflective element, wherein a total thickness of the transparent colloid curing layer and the transparent cover is within a range from 0.3 mm to 1.8 mm.

5. The image capturing apparatus according to claim 1, further comprising:

a second reflective element disposed above the light shielding element and located between the light source and the sensor.

6. The image capturing apparatus according to claim 5, wherein a plurality of microstructures are formed on a surface of at least one of the substrate, the first reflective element, the transparent colloid curing layer, and the second reflective element.

7. The image capturing apparatus according to claim 5, wherein the second reflective element is disposed on a top surface of the transparent colloid curing layer.

8. The image capturing apparatus according to claim 5, further comprising:

a transparent base disposed on the substrate and covering the light shielding element, wherein the second reflective element is disposed on a top surface of the transparent base.

9. The image capturing apparatus according to claim 5, wherein at least one of the first reflective element and the second reflective element comprises a plurality of light-reflecting elements arranged at an interval.

10. The image capturing apparatus according to claim 5, further comprising:

a transparent base disposed on the substrate and covering the light shielding element, wherein the second reflective element is disposed on a top surface of the transparent base, and at least one of the first reflective element and the second reflective element comprises a plurality of light-reflecting elements arranged at an interval.

11. The image capturing apparatus according to claim 1, further comprising:

a plurality of connecting lines respectively connecting between the substrate and the sensor and between the substrate and the light source; and

a wall structure disposed on the substrate, wherein the wall structure and the substrate form an accommodation space for accommodating the light source, the sensor, the light shielding element, and the first reflective element.

12. The image capturing apparatus according to claim 11, further comprising:

a transparent cover disposed on the transparent colloid curing layer and covering the light source, the sensor, the light shielding element, the first reflective element, the connecting lines, and the wall structure, wherein the transparent cover comprises a gel injection hole and a vacuum-pumping hole.

13. The image capturing apparatus according to claim 1, further comprising:

an optical collimator or a grating disposed on the sensor and located between the transparent colloid curing layer and the sensor.

14. A manufacturing method of an image capturing apparatus, comprising:

disposing a light source, a sensor, a light shielding element, and a first reflective element on a substrate, wherein the sensor is located next to the light source, the light shielding element is located between the light source and the sensor, and the first reflective element is located between the light shielding element and the sensor, and

forming a transparent colloid curing layer on the substrate, wherein the transparent colloid curing layer covers the sensor, the light source, the light shielding element, and the first reflective element, and wherein the first reflective element and the sensor are not overlapped in a normal direction of the substrate.

15. The manufacturing method of an image capturing apparatus according to claim 14, wherein forming the transparent colloid curing layer comprises:

forming a transparent colloid on the substrate;

curing the transparent colloid; and

thinning the cured transparent colloid to form the transparent colloid curing layer.

16. The manufacturing method of an image capturing apparatus according to claim 14, further comprising:

forming a second reflective element above the light shielding element, wherein the second reflective element is located between the light source and the sensor.

17. The manufacturing method of an image capturing apparatus according to claim 16, further comprising:

forming a plurality of microstructures on a surface of at least one of the substrate, the first reflective element, the transparent colloid curing layer, and the second reflective element.

18. The manufacturing method of an image capturing apparatus according to claim 16, wherein forming the second reflective element above the light shielding element comprises:

forming the second reflective element on the transparent colloid curing layer after forming the transparent colloid curing layer.

19. The manufacturing method of an image capturing apparatus according to claim 16, further comprising:

covering the light source, the sensor, the light shielding element, and the first reflective element with a transparent cover before forming the transparent colloid curing layer, wherein forming the second reflective element above the light shielding element comprises;

forming the second reflective element on the transparent cover after forming the transparent colloid curing layer.

20. The manufacturing method of an image capturing apparatus according to claim 16, further comprising:

covering the light source, the sensor, the light shielding element, and the first reflective element with a transparent cover before forming the transparent colloid curing layer, wherein forming the second reflective element above the light shielding element comprises;

covering the light shielding element with a transparent base and forming the second reflective element on a top surface of the transparent base, before disposing the transparent cover.

21. The manufacturing method of an image capturing apparatus according to claim 14, further comprising:

forming a wall structure on the substrate before forming the transparent colloid curing layer, wherein the wall structure and the substrate form an accommodation space for accommodating the light source, the sensor, the light shielding element, and the first reflective element;

forming a plurality of connecting lines on the substrate before forming the transparent colloid curing layer, wherein the connecting lines respectively connect between the substrate and the sensor and between the substrate and the light source; and

covering the light source, the sensor, the light shielding element, the first reflective element, the wall structure, and the connecting lines with a transparent cover before forming the transparent colloid curing layer and after forming the connecting lines, wherein the transparent cover covers a side wall surface of the wall structure, and the transparent cover comprises a gel injection hole and a vacuum-pumping hole,

wherein forming the transparent colloid curing layer on the substrate comprises;

injecting a transparent colloid into the accommodation space through the gel injection hole; and

pumping out air in the accommodation space through the vacuum-pumping hole.

22. The manufacturing method of an image capturing apparatus according to claim 21, wherein the gel injection hole and the vacuum-pumping hole are located in a portion of the transparent cover covering the side wall surface of the wall structure, and the wall structure comprises a first through-hole connecting the gel injection hole and a second through-hole connecting the vacuum-pumping hole,

wherein forming the transparent colloid curing layer on the substrate comprises:

injecting the transparent colloid into the accommodation space through the gel injection hole and the first through-hole; and

pumping out air in the accommodation space through the vacuum-pumping hole and the second through-hole.

23. The manufacturing method of an image capturing apparatus according to claim 14, further comprising:

disposing an optical collimator or a grating on the sensor before forming the transparent colloid curing layer.