MOUNTING STRUCTURE

• US 20110097034A1
• Filed: 01/25/2010
• Published: 04/28/2011
• Est. Priority Date: 10/27/2009
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Furuyama, Hideto, Uemura, Hiroshi
• Granted Patent: US 8,380,022 B2
• Time in Patent Office: Days
• US Class Current: 385/14
• CPC Class Codes: G02B 6/4249 comprising arrays of active devices and fibres
• CPC Class Codes: G02B 6/43 Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Abstract

A mounting structure includes an optoelectronic interconnection module that includes electrical interconnection lines, optical interconnection lines, optical semiconductor device and electrical connection terminals, a mounting board that includes electrical interconnection lines and electrical connection terminals on a main surface and on which the optoelectronic interconnection module is mounted, and a connection member that electrically connects, adheres and fixes the electrical connection terminals and the electrical connection terminals. The optoelectronic interconnection module comprises a circuit area on which the optical semiconductor device is mounted and electrical connection terminals are formed and an interconnection area that is formed in a region other than the circuit area and in which the optical interconnection lines and electrical interconnection lines are formed, and the electrical connection terminals are formed on the interconnection area side rather than the optical semiconductor device.

Claims

1. A mounting structure comprising:

an optoelectronic interconnection module mounted on a mounting board and comprising a flexible optoelectronic interconnection board, electrical interconnection lines formed on a main surface of the flexible optoelectronic interconnection board, optical interconnection lines formed on the flexible optoelectronic interconnection board, an optical semiconductor device mounted on the main surface of the flexible optoelectronic interconnection board and optically coupled with the optical interconnection lines, and first electrical connection terminals that are formed on the main surface of the flexible optoelectronic interconnection board to electrically connect the electrical interconnection lines to an exterior;

the optoelectronic interconnection module comprising a circuit area that includes a region on which the optical semiconductor device is mounted and a region in which the first electrical connection terminals are formed, and an interconnection area that includes a region which is an area other than the circuit area and in which the optical interconnection lines and electrical interconnection lines are formed;

the first electrical connection terminals being formed on the interconnection area side rather than the optical semiconductor device;

a mounting board comprising electrical interconnection lines and electrical connection terminals that electrically connect the electrical interconnection lines to the exterior on a main surface, the optoelectronic interconnection module being mounted thereon with the main surface of the flexible optoelectronic interconnection board set to face the main surface thereof; and

a conductive connection member provided between the first electrical connection terminals of the optoelectronic interconnection module and the electrical connection terminals of the mounting board to electrically connect, adhere and fix the respective electrical connection terminals.

2. The structure of claim 1, wherein the optoelectronic interconnection module further comprises second electrical connection terminals formed on the main surface of the flexible optoelectronic interconnection board on an opposite side of the first electrical connection terminals with respect to the optical semiconductor device, and is connected to the electrical connection terminals of the mounting board at two portions of the first electrical connection terminals and the second electrical connection terminals by means of the connection member.

3. The structure of claim 2, wherein the connection member comprises connection members separately arranged for the first electrical connection terminals and the second electrical connection terminals.

4. The structure of claim 2, wherein the connection member is continuously formed from the first electrical connection terminals to the second electrical connection terminals.

5. The structure of claim 1, wherein the connection member is one of an anisotropic conductive film and anisotropic conductive paste that forms a conductive path and cures by thermocompression bonding.

6. The structure of claim 1, wherein the optical interconnection lines of the optoelectronic interconnection module are formed to avoid the first electrical connection terminals.

7. The structure of claim 1, wherein the flexible optoelectronic interconnection board comprises a bending portion that causes a portion in which the first electrical connection terminals are provided to be set closer to the mounting board rather than a portion on which the optical semiconductor device is mounted.

8. The structure of claim 1, wherein one of a concave portion and through-hole having an area greater than an area of the optical semiconductor device on the mounting board side is formed in the main surface of the mounting board.

9. The structure of claim 1, further comprising a thermally-conductive member that is provided between the optical semiconductor device and the mounting board and releases heat of the optical semiconductor device to the mounting board side.

10. A mounting structure comprising:

an optoelectronic interconnection module mounted on a mounting board and comprising a flexible optoelectronic interconnection board, electrical interconnection lines formed on a main surface of the flexible optoelectronic interconnection board, optical interconnection lines formed on the flexible optoelectronic interconnection board, an optical semiconductor device mounted on the main surface of the flexible optoelectronic interconnection board and optically coupled with the optical interconnection lines, a driver IC that is mounted on the main surface of the flexible optoelectronic interconnection board and drives the optical semiconductor device, and first electrical connection terminals that are formed on the main surface of the flexible optoelectronic interconnection board to electrically connect the electrical interconnection lines to an exterior;

the optoelectronic interconnection module comprising a circuit area that includes a region on which the optical semiconductor device and driver IC are mounted and a region in which the first electrical connection terminals are formed, and an interconnection area that comprises a region which is an area other than the circuit area and in which the optical interconnection lines and electrical interconnection lines are formed;

the first electrical connection terminals being formed on the interconnection area side rather than the optical semiconductor device and driver IC;

a mounting board comprising electrical interconnection lines and electrical connection terminals that electrically connect the electrical interconnection lines to the exterior on a main surface, the optoelectronic interconnection module being mounted thereon with the main surface of the flexible optoelectronic interconnection board set to face the main surface thereof; and

a conductive connection member provided between the first electrical connection terminals of the optoelectronic interconnection module and the electrical connection terminals of the mounting board to electrically connect, adhere and fix the respective electrical connection terminals.

11. The structure of claim 10, wherein the optoelectronic interconnection module further comprises second electrical connection terminals formed on the main surface of the flexible optoelectronic interconnection board on an opposite of the first electrical connection terminals with respect to the optical semiconductor device and driver IC, and is connected to the electrical connection terminals of the mounting board at two portions of the first electrical connection terminals and the second electrical connection terminals by means of the connection member.

12. The structure of claim 11, wherein the connection member comprises connection members separately arranged for the first electrical connection terminals and the second electrical connection terminals.

13. The structure of claim 11, wherein the connection member is continuously formed from the first electrical connection terminals to the second electrical connection terminals.

14. The structure of claim 10, wherein the connection member is one of an anisotropic conductive film and anisotropic conductive paste that forms a conductive path and cures by thermocompression bonding.

15. The structure of claim 10, wherein the optical interconnection lines of the optoelectronic interconnection module are formed to avoid the first electrical connection terminals.

16. The structure of claim 10, wherein the driver IC of the optoelectronic interconnection module is mounted between the optical semiconductor device and the first electrical connection terminals.

17. The structure of claim 10, wherein the flexible optoelectronic interconnection board comprises a bending portion that causes a portion in which the first electrical connection terminals are provided to be set closer to the mounting board rather than a portion on which the optical semiconductor device and driver IC are mounted.

18. The structure of claim 10, wherein one of a concave portion and through-hole having an area greater than an area of the optical semiconductor device and driver IC on the mounting board side is formed in the main surface of the mounting board.

19. The structure of claim 10, further comprising a thermally-conductive member that is provided between at least one of the driver IC and optical semiconductor device and the mounting board and releases heat of at least one of the driver IC and optical semiconductor device to the mounting board side.