Optical signal distribution system

• US 5,208,879 A
• Filed: 10/18/1991
• Issued: 05/04/1993
• Est. Priority Date: 10/18/1991
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Gallo, Antonio R., Robbins, Gordon J., Shaw, Robert R.
• Primary Examiner(s): Ullah, Akm E.
• Application Number:
  US07/779,428
• Time in Patent Office: 564 Days
• Field of Search: 385/13-15
• US Class Current: 385/14
• CPC Class Codes: G02B 6/12004 Combinations of two or more optical elements

Abstract

Disclosed is an optical signal distribution system. The system comprises an electronic substrate, at least one optical component and at least one optical waveguide on but distinct from the electronic substrate for carrying an optical signal to or from the optical component.

Claims

1. An optical signal distribution system comprising:

a) an electronic substrate having a principal surface;

b) at least one optical component on said principal surface of said electronic substrate; and

c) at least one optical waveguide nonintegrally formed on said principal surface but distinct from said electronic substrate through which an optical signal may be passed to or from said optical component.

2. The optical signal distribution system in claim 1 wherein said electronic substrate acts as an alignment carrier structure for said waveguide.

3. The optical signal distribution system in claim 1 wherein said optical waveguide is directly on but not bonded to said substrate.

4. The optical signal distribution system in claim 1 wherein said optical waveguide overlays electrical wiring on said principal surface of said substrate.

5. The optical signal distribution system in claim 1 wherein said optical waveguide is selected from the group of materials consisting of glass, polyacrylate, polycarbonate, polystyrene and polyimide.

6. The optical signal distribution system in claim 5 wherein said optical waveguide is a polyacrylate material.

7. The optical signal distribution system in claim 6 wherein said polyacrylate is polymethyl methacrylate.

8. The optical signal distribution system in claim 1 further comprising an alignment carrier structure nonintegrally formed on but distinct from said substrate comprised of at least one layer on or within which is placed said optical waveguide.

9. The optical signal distribution system in claim 8 wherein said alignment carrier structure is shaped in a grid-like pattern for placement between a grid-like pattern of integrated circuit chips.

10. The optical signal distribution system in claim 8 wherein said optical waveguide comprises metal-reflectorized voids formed within said alignment structure.

11. The optical signal distribution system in claim 8 wherein said waveguide is applied as a ridge directly on the top or bottom surfaces of said alignment carrier structure.

12. The optical signal distribution system in claim 8 wherein said waveguide is embedded in channels formed within said alignment carrier structure.

13. The optical signal distribution system in claim 8 wherein said alignment carrier structure comprises a plurality of layers and said waveguide is enclosed between the layers of said alignment carrier structure.

14. The optical signal distribution system in claim 8 wherein said alignment carrier structure overlays electrical wiring on said principal surface of said substrate.

15. The optical signal distribution system in claim 8 wherein said layers of said alignment structure are selected from the group of materials consisting of polymer, metal and glass.

16. The optical signal distribution system in claim 8 wherein directional optical couplers are formed in the alignment carrier structure.

17. The optical signal distribution system in claim 1 wherein said optical waveguide is a decal.

18. A method of forming an optical signal distribution system of the type comprising an electronic substrate having a principal surface and at least one optical component on the principal surface, the method comprising the step of placing at least one preformed optical waveguide onto the principal surface of the electronic substrate wherein an optical signal may be passed to or from the optical component through said optical waveguide.

19. The method of claim 18 wherein the optical signal distribution system further comprises a plurality of optical waveguides and an alignment carrier structure having a plurality of layers on or within which is placed said optical waveguides, the method further comprising the steps of:

forming said alignment carrier structure according to the following steps;

a) forming a first carrier layer;

b) positioning at least one optical waveguide on or within said first carrier layer;

c) forming a next carrier layer;

d) positioning said next carrier layer over said first carrier layer and said optical waveguide;

e) repeating steps b, c and d as necessary to form the desired alignment carrier structure; and

f) bonding said carrier layers together; and

placing said alignment carrier structure on the principal surface of the electronic substrate.