Method and device for fast, passive alignment in photonics assembly

Patent metadata

Field	Value
Publication number	US-12493151-B2
Application number	US-202318488074-A
Country	US
Kind code	B2
Filing date	Oct 17, 2023
Priority date	Sep 23, 2021
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

The present disclosure relates to a method including providing a die including a cavity therein, wherein the die further may include a die fiducial on a top surface. The method further includes placing a lens structure in the cavity of the die, wherein the lens structure may include a lens fiducial on a front surface. The method also includes moving the lens structure in the cavity to a position until a lens fiducial image may be captured in an image processing system when the lens fiducial and the die fiducial coincide and lie in a plane orthogonal to the top surface of the die. A corresponding system is also disclosed herein.

First claim

What is claimed is:

1 . A device comprising:
a lens structure positioned within a cavity of a die, wherein the die comprises a die fiducial, wherein the lens structure comprises a lens fiducial so that the lens fiducial and the die fiducial coincide and lie in a plane orthogonal to a top surface of the die.

2 . The device of claim 1 , further comprising a pickup too,
wherein the lens structure is configured to be held in position by a pickup tool.

3 . The device of claim 2 ,
wherein the pickup tool comprises a mirror or prism.

4 . The device of claim 3 ,
wherein the mirror or prism is arranged between 40 and 50 degrees with respect to a top surface of the die.

5 . The device of claim 1 ,
wherein the lens structure comprises an embedded mirror.

6 . The device of claim 5 ,
wherein the embedded mirror is located at a rear edge opposing a front surface of the lens structure.

7 . The device of claim 6 ,
wherein the embedded mirror may be arranged between 40 and 50 degree with respect to a top surface of the die.

8 . The device of claim 1 ,
wherein the lens structure comprises the lens fiducial at least partially etched from a front surface to a rear surface.

9 . The device of claim 1 ,
wherein lens structure comprises the lens fiducial at least partially etched on a front surface from top to bottom of the lens structure.

10 . The device of claim 9 ,
wherein the lens structure comprises the lens fiducial including alignment markers at or adjacent to the bottom of the lens structure to aid with performing focus in a single step with the image processing system on the lens and die fiducials.

11 . A system comprising:
a means for capturing an image of a lens fiducial, wherein the lens fiducial is disposed on a front surface of a lens structure, wherein the means for capturing the image is configured to capture the image of the lens fiducial in relation to a die fiducial, wherein the die fiducial is disposed on a top surface of a die, wherein the die comprises a cavity, wherein the means for capturing the image is further configured to capture the image of the lens fiducial when the lens fiducial and the die fiducial coincide and lie in a plane orthogonal to the top surface of the die; and a means for controlling movement of the lens structure to move the lens structure relative to the cavity.

12 . The system of claim 11 ,
wherein the means for controlling movement of the lens structure comprises a means for reflecting light mounted thereon.

13 . The system of claim 12 ,
wherein the means for controlling movement of the lens structure comprises a means for reflecting light mounted between 40 and 50 degrees with respect to the top surface of the die.

14 . The system of claim 11 ,
wherein the lens structure comprises a means for reflecting light therein.

15 . The system of claim 14 ,
wherein the lens structure comprises the means for reflecting light located at a rear edge opposing the front surface of the lens structure.

16 . The system of claim 15 ,
wherein the lens structure comprises the means for reflecting light arranged between 40 and 50 degrees with respect to the top surface of the die.

17 . The system of claim 11 ,
wherein the lens structure comprises the means for aligning the lens structure with respect to the die at least partially etched from the front surface to a rear surface.

18 . The system of claim 11 ,
wherein lens structure comprises the means for aligning the lens structure with respect to the die at least partially etched on the front surface from top to bottom of the lens structure.

19 . The system of claim 18 ,
wherein the lens structure comprises the means for aligning the lens structure with respect to the die including alignment markers at or adjacent to the bottom of the lens structure to aid with performing focus in a single step with the means for capturing the image on the lens and die fiducials.

20 . The system of claim 11 , wherein the means for capturing the image is top mounted to capture the lens fiducial image in a plane orthogonal to the top surface of the die.

Assignees

• Intel Corp

Inventors

• Abraham Vineeth
• Morgan Wesley
• Moret Eric
• Diglio Paul
• Nekkanty Srikant

Classifications

• G02B6/4224

  using visual alignment markings, e.g. index methods · CPC title

• G02B6/425

  Optical features (semiconductor laser arrays H01S5/40; hybrid LED arrays H10W90/00) · CPC title

• G02B6/32

  having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} · CPC title

• G02B6/30 Primary

  for use between fibre and thin-film device · CPC title