# US 11,112,300 B2 · Optical sensor package and method of producing same

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- Number: US 11,112,300 B2
- Document ID: US11112300B2
- Status: Granted
- Kind: B2
- Application number: 16/633,509
- Filed: 2018-07-18
- Published: 2020-07-16
- Granted: 2021-09-07
- Earliest claimed: 2017-07-27
- Assignees: Ams AG
- Applicants: ams AG
- Inventors: Harald Etschmaier; Klaus Schmidegg
- Web page: https://patentgrep.com/patent/US11112300B2

## CPC

- G01J 1/0474: {Diffusers (cavities G01J2001/0481)}
- G01J 1/0437: {using masks, aperture plates, spatial light modulators, spatial filters, e.g. reflective filters}
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

The optical sensor package comprises an optical sensor device with a sensor element arranged inside a housing comprising a cap. A diffuser is arranged in an aperture of the cap opposite the sensor element and prolongs the cap in the aperture or closes the aperture. The method comprises forming a cap with an aperture, arranging a diffusing material in the aperture, thus forming a diffuser, and after forming the diffuser, arranging an optical sensor device with a sensor element inside a housing that includes the cap, such that the sensor element is opposite the diffuser.

## Claims

### Claim 1

An optical sensor package, comprising:
an optical sensor device with a sensor element,
a cover of the optical sensor device, and
a housing comprising a cap with an aperture, the optical sensor device being arranged inside the housing,
a diffuser is arranged in the aperture opposite the sensor element,
the diffuser prolongs the cap within the aperture or closes the aperture, and
the cover being arranged at a distance from the diffuser, wherein the distance is adjusted with respect to the cover in such a manner that a maximal angle of incidence of 40° is obtained at the sensor element for radiation of at least one wavelength that is to be detected.

### Claim 2 (depends on 1)

The optical sensor package of claim 1, wherein the diffuser comprises an epoxy resin.

### Claim 3 (depends on 1)

The optical sensor package of claim 1, wherein the diffuser comprises silicone.

### Claim 4 (depends on 1)

The optical sensor package of claim 1, wherein the cap comprises a liquid-crystal polymer.

### Claim 5 (depends on 1)

The optical sensor package of claim 1, wherein the cap comprises a polyphenylene sulfide.

### Claim 6 (depends on 1)

The optical sensor package of claim 1, wherein the cap comprises a metal.

### Claim 7 (depends on 1)

The optical sensor package of claim 1,
wherein the cover has a refractive index greater than a refractive index that is present between the cover and the diffuser by a factor of at least 1.5 for at least one wavelength that is to be detected.

### Claim 8 (depends on 1)

The optical sensor package of claim 1, wherein a lateral surface of the cap facing the aperture is provided with a structural feature.

### Claim 9 (depends on 8)

The optical sensor package of claim 8, wherein the lateral surface is tapered towards the diffuser.

### Claim 10

A method of producing an optical sensor package, comprising:
forming a cap with an aperture,
arranging a diffusing material in the aperture, thus forming a diffuser, and
after forming the diffuser, arranging an optical sensor device with a sensor element inside a housing that includes the cap, such that the sensor element is opposite the diffuser, wherein the optical sensor device comprises a cover that is arranged at a distance from the diffuser, and wherein the distance is adjusted with respect to the cover in such a manner that a maximal angle of incidence of 40° is obtained at the sensor element for radiation of at least one wavelength that is to be detected.

### Claim 11 (depends on 10)

The method of claim 10, wherein an epoxy resin or silicone is used for the diffusing material.

### Claim 12 (depends on 10)

The method of claim 10, wherein a material selected from the group consisting of liquid-crystal polymer, polyphenylene sulfide and metal is used for the cap.

### Claim 13 (depends on 10)

The method of claim 10, further comprising:
forming the cap and the diffuser by injection molding, using an opaque material for the cap and a diffusing material for the diffuser.