OPTICAL THUMBTACK

• US 20040126058A1
• Filed: 12/31/2002
• Published: 07/01/2004
• Est. Priority Date: 12/31/2002
• Status: Active Grant

• Current Assignee: Micron Technology, Inc.
• Original Assignee: Intel Corporation
• Inventors: Lu, Daoqiang, Braunisch, Henning, Vandentop, Gilroy J., Towle, Steven N.
• Granted Patent: US 6,792,179 B2
• Time in Patent Office: Days
• US Class Current: 385/33
• CPC Class Codes: G02B 6/43 Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
• CPC Class Codes: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 1/181 associated with surface mounted components

Abstract

An optical or optoelectronic component is mounted to a substrate, and an optical thumbtack is inserted into a through-hole of the substrate. The optical thumbtack is positioned to receive light from or send light to the optical or optoelectronic component and provide a conditioned, for example collimated or focused, beam. The optical thumbtack comprises a lens portion, a spacer portion, and a foot portion. Light may enter the thumbtack from either direction.

Claims

1. An apparatus comprising:

a substrate having a through-hole;

an optical or optoelectronic device positioned in at least partial optical alignment with the through-hole; and

an optical thumbtack inserted into the through-hole, wherein the optical thumbtack comprises a lens portion, a spacer portion, and a foot portion.

2. The apparatus of claim 1, wherein the foot portion of the optical thumbtack rests on a surface of the substrate.

3. The apparatus of claim 2, wherein a base of the foot portion is angled in a plane that is not perpendicular to an axis of the optical thumbtack.

4. The apparatus of claim 1, wherein the foot portion abuts against a bottom surface of the substrate and the lens portion is located at least partially within the through-hole.

5. The apparatus of claim 1, wherein the foot portion comprises a second lens portion.

6. The apparatus of claim 1, wherein the foot portion abuts against a top surface of the substrate and the lens portion is located between the substrate and the optical or optoelectronic device.

7. The apparatus of claim 6, wherein the optical thumbtack further comprises a second lens portion, the second lens portion located at least partially within the through-hole.

8. The apparatus of claim 1, further comprising a waveguide, the waveguide positioned in optical alignment with the optical thumbtack.

9. The apparatus of claim 8, wherein an air gap separates the waveguide from the optical thumbtack.

10. The apparatus of claim 1, wherein the optical thumbtack comprises a polymer.

11. The apparatus of claim 10, wherein the optical thumbtack comprises polycarbonate, polyimide, polycyanurates or benzocyclobutene (BCB).

12. The apparatus of claim 1 further comprising:

at least one anti-reflective coating on the optical thumbtack.

13. The apparatus of claim 1, wherein the optical or optoelectronic device comprises a photodetector.

14. The apparatus of claim 1, wherein the optical or optoelectronic device comprises a laser.

15. The apparatus of claim 1, wherein the optical or optoelectronic device comprises a vertical-cavity surface-emitting laser (VCSEL).

16. A method of conditioning light on its path to or from an optical or optoelectronic device mounted to a substrate, the method comprising:

inserting an optical thumbtack into a through-hole of the substrate, the optical thumbtack comprising a lens portion, a spacer portion, and a foot portion; and

pushing the optical thumbtack into the through-hole until the foot portion stops the optical thumbtack from being inserted further.

17. The method of claim 16, wherein securing the optical thumbtack further comprises attaching the optical thumbtack to the substrate with an adhesive or epoxy.

18. The method of claim 16, wherein the optical thumbtack is one of an array of optical thumbtacks joined by their respective foot portions, and the array of optical thumbtacks is aligned to respective optical or optoelectronic devices.

19. The method of claim 18 further comprising:

securing the array of optical thumbtacks to the substrate.

20. A method of conditioning light comprising:

inserting an optical thumbtack into a through-hole of a substrate, the optical thumbtack comprising a lens portion, a spacer portion, and a foot portion; and

pushing the optical thumbtack into the through-hole until the foot portion stops the optical thumbtack from being inserted further; and

providing light into the optical thumbtack.

21. The method of claim 20, further comprising:

bonding the optical thumbtack to the substrate.

22. The method of claim 20, further comprising:

applying at least one anti-reflective coating to the optical thumbtack.

23. A method of conditioning light comprising:

inserting an array of optical thumbtacks into one or more through-holes of a substrate, the array of optical thumbtacks comprising lens portions, spacer portions or a common spacer portion, and a common foot portion; and

pushing the array of optical thumbtacks into the through-holes until the foot portion stops the array of optical thumbtacks from being inserted further; and

optically coupling the array of optical thumbtacks to one or more optical or optoelectronic devices.

24. The method of claim 23, further comprising:

bonding the array of optical thumbtacks to the substrate.

25. The method of claim 23, further comprising:

applying at least one anti-reflective coating to the array of optical thumbtacks.

26. A method of coupling an optical or optoelectronic device in a system comprising:

attaching a first optical or optoelectronic device to a first surface;

attaching a second optical or optoelectronic device to a second surface;

inserting one or more optical thumbtacks into one or more through-holes aligned to the first and/or second optical or optoelectronic device; and

optically coupling the one or more optical thumbtacks together via at least one waveguide or waveguide array.

27. The method of claim 26, further comprising:

providing light from the first optical or optoelectronic device, and receiving the light by the second optical or optoelectronic device.

28. A system comprising:

a substrate;

an optical thumbtack inserted into the substrate, the optical thumbtack having a lens portion, a spacer portion, and a foot portion;

an optical or optoelectronic component coupled to provide a light beam to the optical thumbtack causing the optical thumbtack to provide a conditioned beam;

a waveguide for optically coupling the conditioned beam to a receiving optical or optoelectronic component.

29. The system of claim 28, further comprising:

a second optical thumbtack to condition the beam from the waveguide and send the beam to the receiving optical or optoelectronic component.

30. The system of claim 29, wherein the second optical thumbtack has an anti-reflective coating.

31. The system of claim 28, wherein the optical thumbtack has an anti-reflective coating.