FLEXIBLE PRINTED CIRCUIT AND METHOD FOR MAKING SAME

• US 20090288860A1
• Filed: 08/28/2008
• Published: 11/26/2009
• Est. Priority Date: 05/23/2008
• Status: Abandoned Application

• Current Assignee: Chi Mei Communication Systems Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Chi Mei Communication Systems Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: LIN, HUNG-TA
• Application Number:
  US12/199,896
• Publication Number:
  US 20090288860A1
• Time in Patent Office: Days
• US Class Current: 174/254
• CPC Class Codes: H05K 1/0215 Grounding of printed circuits by connection to external grounding means
• CPC Class Codes: H05K 1/0219 Printed shielding conductors for shielding around or between signal conductors, e.g. coplanar or coaxial printed shielding conductors
• CPC Class Codes: H05K 1/0259 Electrostatic discharge [ESD] protection
• CPC Class Codes: H05K 1/182 associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/0397 Tab
• CPC Class Codes: H05K 2201/0715 provided by an outer layer of PCB
• CPC Class Codes: H05K 2201/09618 Via fence, i.e. one-dimensional array of vias
• CPC Class Codes: H05K 2201/10189 Non-printed connector
• CPC Class Codes: Y10T 29/49128 Assembling formed circuit to base

Abstract

A flexible printed circuit (100) includes a main body (10) and at least one grounding layer (30). The main body includes a first connecting end (11), a band portion (12) and a second connecting end (13). The first connecting end and the second connecting end dispose a first connector (112) and a second connector (132) electrically connected with the first connecting end and the second connecting end, respectively. The band portion has a plurality of circuits, including grounding circuits, to electrically connect with the first connector and the second connector. The band portion defines a plurality of via holes (121). The grounding layer is disposed on a surface of the main body, and electrically connects with the grounding circuits of the band portion by via holes. The invention also provides a method for making the flexible printed circuit.

Claims

1. A flexible printed circuit comprising:

a main body comprising;

a first connecting end having a first connector disposed thereon;

a second connecting end having a second connector disposed thereon; and

a band portion having a plurality of circuits disposed therein and a plurality of via holes, the circuits electrically connecting the first connector to the second connector, and including grounding circuits; and

at least one grounding layer disposed on at least one surface of the main body, and electrically connected with the grounding circuits by the via holes.

2. The flexible printed circuit as claimed in claim 1, wherein the ground layer includes a pasting portion pasted on one surface of the main body and at least one elongation extending outwardly from a side of the pasting portion.

3. The flexible printed circuit as claimed in claim 2, wherein the pasting portion is rectangular and pasted on the surface of the main body with the first connector and the second connector disposed thereon;

the first connector and the second connector penetrating and emerging through the pasting portion.

4. The flexible printed circuit as claimed in claim 2, wherein the elongation includes a first elongation and a second elongation, the elongations extending outwardly from the two ends of the pasting portion that near the first connector and the second connector, respectively, to enlarge the grounding contact area of the ground layer.

5. The flexible printed circuit as claimed in claim 1, wherein the ground layer is a plurality of grounding points or flexible grounding bands disposed on one surface of the main body.

6. The flexible printed circuit as claimed in claim 1, wherein the ground layer is made of electrically conductive material.

7. The flexible printed circuit as claimed in claim 6, wherein the electrically conductive material is copper.

8. A method for making the flexible printed circuit including the following steps:

providing a flexible printed circuit including a first connecting end, a band portion and a second connecting end, the first connecting end and the second connecting end having a first connector and a second connector disposed thereon respectively and electrically connecting the first connector and a second connector with the first connecting end and the second connecting end, respectively;

defining a plurality of via holes through the band portion of the flexible printed circuit; and

disposing a ground layer on at least one surface of the main body to electrically connect with the grounding circuits by the via holes.

9. The method for making the flexible printed circuit as claimed in claim 8, wherein the step of disposing a ground layer includes pasting a copper layer on the surface of the band portion.

10. The method for making the flexible printed circuit as claimed in claim 8, wherein the step of disposing a ground layer includes pasting a pasting portion on one surface of the main body and providing at least one elongation extending outwardly from one side of the pasting portion.

11. The method for making the flexible printed circuit as claimed in claim 8, further comprising providing the first connecting end with a first connector disposed thereon and electrically connected with the first connecting end and providing the second connecting end with a second connector disposed thereon and electrically connected with the second connecting end.