Wired circuit board and connection structure of wired circuit board

• US 20050272276A1
• Filed: 05/24/2005
• Published: 12/08/2005
• Est. Priority Date: 05/25/2004
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Ooyabu, Yasunari
• Granted Patent: US 7,286,370 B2
• Time in Patent Office: Days
• US Class Current: 439/35
• CPC Class Codes: H01R 12/61 connecting to flexible printed circuits, flat or ribbon cables or like structures
• CPC Class Codes: H05K 1/142 Arrangements of planar printed circuit boards in the same plane, e.g. auxiliary printed circuit insert mounted in a main printed circuit
• CPC Class Codes: H05K 2201/0397 Tab forming integral conductive tabs H05K3/4092
• CPC Class Codes: H05K 2201/058 Direct connection between two or more FPCs or between flexible parts of rigid PCBs
• CPC Class Codes: H05K 2201/0969 Apertured conductors
• CPC Class Codes: H05K 2201/2009 Reinforced areas, e.g. for a specific part of a flexible printed circuit
• CPC Class Codes: H05K 3/0058 Laminating printed circuit boards onto other substrates, e.g. metallic substrates H05K1/0281 takes precedence
• CPC Class Codes: H05K 3/363 by soldering

Abstract

In order to provide a wired circuit board in which electrical continuity inspection can be omitted and a connection structure of the wired circuit board, in connection between a first wired circuit board 1 and a second wired circuit board 2, a first connection terminal 13 and a second connection terminal 14 are abutted against each other in the direction in which they are opposed along the respective longitudinal direction of the wired circuit boards, and are arranged in line with each other, and a solder bump 15 is provided so as to continuously extend over surfaces of the first connection terminal 13 and the second connection terminal 14. Consequently, the solder bump 15 is not interposed between opposed surfaces of the first connection terminal 13 and the second connection terminal 14, thereby allowing electrical connection by the solder bump 15 between the first connection terminal 13 and the second connection terminal 14 to be confirmed from the appearance by visual observation.

Claims

1. A wired circuit board comprising:

a first wired circuit board having a first connection terminal;

a second wired circuit board having a second connection terminal; and

a connection conductive portion for electrically connecting the first connection terminal and the second connection terminal to each other, wherein

the first connection terminal and the second connection terminal are arranged so as to be opposed to each other, and

the connection conductive portion is connected to the first connection terminal and the second connection terminal so as not to be interposed between opposed surfaces of the first connection terminal and the second connection terminal.

2. The wired circuit board according to claim 1, wherein

the first connection terminal and the second connection terminal are arranged on the same side with respect to the connection conductive portion, and

the connection conductive portion is provided so as to extend over the first connection terminal and the second connection terminal.

3. The wired circuit board according to claim 2, wherein

the first connection terminal and the second connection terminal are abutted against each other in the direction in which they are opposed, and

the connection conductive portion is continuously provided on surfaces of the first connection terminal and the second connection terminal that are arranged on the same side in the abutted state.

4. The wired circuit board according to claim 2, wherein

the first connection terminal and the second connection terminal are arranged so as to be partially overlapped with each other.

5. The wired circuit board according to claim 4, wherein

either one of the first connection terminal and the second connection terminal that are brought into contact with the connection conductive portion is formed with a through hole that penetrates the first connection terminal or the second connection terminal in the thickness direction in a portion where the first connection terminal and the second connection terminal are overlapped with each other.

6. A connection structure of a wired circuit board in which a first wired circuit board having a first connection terminal and a second wired circuit board having a second connection terminal are connected to each other through a connection conductive portion for electrically connecting the first connection terminal and the second connection terminal to each other, wherein

the first connection terminal and the second connection terminal are arranged so as to be opposed to each other, and

the connection conductive portion is connected to the first connection terminal and the second connection terminal so as not to be interposed between opposed surfaces of the first connection terminal and the second connection terminal.

7. The connection structure of the wired circuit board according to claim 6, wherein

the first connection terminal and the second connection terminal are arranged on the same side with respect to the connection conductive portion, and

the connection conductive portion is provided so as to extend over the first connection terminal and the second connection terminal.

8. The connection structure of the wired circuit board according to claim 7, wherein

the first connection terminal and the second connection terminal are abutted against each other in the direction in which they are opposed, and

the connection conductive portion is continuously provided on surfaces of the first connection terminal and the second connection terminal that are arranged on the same side in the abutted state.

9. The connection structure of the wired circuit board according to claim 7, wherein

the first connection terminal and the second connection terminal are arranged so as to be partially overlapped with each other.

10. The connection structure of the wired circuit board according to claim 9, wherein

either one of the first connection terminal and the second connection terminal that are brought into contact with the connection conductive portion is formed with a through hole that penetrates the first connection terminal or the second connection terminal in the thickness direction in a portion where the first connection terminal and the second connection terminal are overlapped with each other.