Card-type portable device

• US 6,719,570 B2
• Filed: 05/22/2002
• Issued: 04/13/2004
• Est. Priority Date: 05/22/2001
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Tsuchioka, Mitsuhiro
• Primary Examiner(s): Nguyen, Truc
• Application Number:
  US10/152,285
• Publication Number:
  US 20020177335A1
• Time in Patent Office: 692 Days
• Field of Search: 439/951, 439/945, 439/946, 439/638, 439/76.1, 361/737, 235/492
• US Class Current: 439/76.1
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07732 the record carrier having a housing or construction similar to well-known portable memory devices, such as SD cards, USB or memory sticks housings for electrical equipment in general, see H05K5/02
• CPC Class Codes: G06K 19/07743 External electrical contacts
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
• CPC Class Codes: H05K 1/141 One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters H05K1/142 and H05K1/147 take precedence
• CPC Class Codes: H05K 2201/094 Array of pads or lands differing from one another, e.g. in size, pitch, thickness; Using different connections on the pads using different types of conductors H05K2201/0391
• CPC Class Codes: H05K 3/3436 having an array of bottom contacts, e.g. pad grid array or ball grid array components
• CPC Class Codes: H05K 3/368 parallel to each other H05K3/361 takes precedence
• CPC Class Codes: H05K 5/0269 Card housings therefor, e.g. covers, frames, PCB
• CPC Class Codes: Y10S 439/951 PCB having detailed leading edge

Abstract

In a card-type portable device, a terminal board is provided in the terminal board mounting area of a circuit board. Terminal electrodes are provided on a surface of the terminal board. The terminal electrodes are arranged at a height position according to a device specification by setting the thickness of the terminal board such that the terminal electrodes are positioned at the specified height position even when the height position of the circuit board is freely set. Also, by placing the circuit board along the wall of the bottom of a casing, the space defined by the circuit board and the upper wall of the casing is increased. Accordingly, tall electronic components can be provided on the circuit board in the casing, while maintaining the specified thickness of the casing.

Claims

1. A card-type portable device comprising:

a circuit board for mounting electronic component to define a circuit;

a casing for accommodating the circuit board, a portion of the circuit board being extending outside of the casing; and

a terminal board including a surface provided with a plurality of terminal electrodes;

wherein

the terminal board is mounted on the circuit board, the terminal electrodes being provided at the exposed portion of the circuit board and the terminal electrodes are disposed above and spaced from an upper surface of the circuit board;

wherein the plurality of terminal electrodes electrically connected to the circuit board.

2. The card-type portable device according to claim 1, wherein the casing includes a pair of walls which face each other with a space therebetween and which are substantially parallel to each other, the circuit board is arranged along the inner surface of one of the pair of walls, a terminal electrode surface of the terminal board is arranged so as to be substantially parallel to the surface of the circuit board, and the location of the terminal electrode surface is determined based on a thickness of the terminal board.

3. The card-type portable device according to claim 1, wherein the surface of the terminal board including the plurality of terminal electrodes is a top surface, a bottom surface of the terminal board includes a plurality of connection electrodes connected to the terminal electrodes of the terminal board, and a terminal board mounting portion of the circuit board includes a plurality of connection patterns which face and are connected to the connection electrodes of the terminal board.

4. The card-type portable device according to claim 1, wherein the difference between the coefficient of linear expansion in the direction along the board surface of the terminal board and the coefficient of linear expansion in a direction along the board surface of the circuit board is about 26.6 ppm/°

C. or less.

5. The card-type portable device according to claim 1, wherein the material of the terminal board and the material of the circuit board have the same coefficient of linear expansion in a direction along the board surface.

6. The card-type portable device according to claim 1, wherein the card-type portable device is a communication card having a communication function.

7. The card-type portable device according to claim 3, wherein the terminal electrodes and the connection electrodes of the terminal board are defined by different conductors.

8. The card-type portable device according to claim 3, wherein the plurality of terminal electrodes and the plurality of connection electrodes of the terminal board are aligned, the plurality of connection patterns of the circuit board is aligned with the connection electrodes of the terminal board, and the width of the terminal board in the alignment direction of the terminal electrodes is greater than the width of the circuit board in the alignment direction of the connection patterns.

9. The card-type portable device according to claim 3, wherein each of the connection electrodes of the terminal board and each of the connection patterns of the circuit board includes a plurality of connection lands and coupling lands for mutually coupling the connection lands.

10. The card-type portable device according to claim 9, wherein the connection electrodes of the terminal board and the connection patterns of the circuit board are covered with resist, the resist is provided with openings in portions of the connection land such that the connection lands are exposed, and the connection electrodes of the terminal board are the connection patterns of the circuit board facing each other are soldered.

12. The card-type portable device according to claim 1, wherein the electronic components are mounted on a bottom surface of the terminal board and the terminal board mounting area of the circuit board is provided with hole portions for the electronic components in portions corresponding to the electronic components.

11. The card-type portable device according to claim 13, wherein a solder ball is attached to each of the connection lands of the connection electrodes, and the connection land of the connection electrodes and the connection lands of the connection patterns facing each other are bonded via the solder balls.