Flexible printed circuits
AssigneeCompaq Computer Corporation
InventorDaniel P. Haas
Life of this patent
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Abstract
The present invention provides flexible, tear-resistant printed circuits comprising first and second electrical conductors and a flexible, insulating core separating and supporting said first and second conductors. The core preferably comprises aromatic polyamide fiber in a resin binder matrix. Rigid/flex circuits including the flexible, tear-resistant printed circuits are disclosed.
Claims30
A printed circuit board comprising:
- (a) at least first and second rigid printed circuit sections;
- (b) a flexible printed circuit comprising first and second conductors and a core having an LAT of at least 25 lb./mil separating and supporting said conductors, said flexible circuit having a minimum bend radius of no greater than 120 mil and wherein:
- (i) at least a first portion of said flexible core is connected to said first rigid printed circuit section;
- (ii) at least a second portion of said flexible core is connected to said second rigid printed circuit section;
- (iii) at least a third portion of said flexible core extends beyond the periphery of each of said rigid printed circuit sections;
- and
- (iv) at least one of said conductors electrically connects said first rigid printed circuit section to said second rigid circuit section, said flexible printed circuit thereby providing a tear-resistant electrical connection between said first rigid printed circuit section and said second rigid printed circuit section.
An improved printed circuit board comprising:
- (a) a rigid printed circuit section;
- and
- (b) a flexible printed circuit comprising a flexible, highly tear-resistant insulating core having an LAT value of at least 25 lb./mil, at least a first portion of said core being connected to said rigid circuit section, said flexible printed circuit having a minimum bend radius of no greater than 120 mil.
A flexible, tear-resistant printed circuit having a minimum bend radius of no greater than 120 mil. and comprising at least first and second electrical conductors and a flexible, insulating core having an LAT value of at least 25 lb./mil separating and supporting said first and second conductors, said core comprising aromatic polyamide fiber in a matrix of resin binder.
A flexible printed circuit board having a minimum bend radius of at lest 120 mil. and comprising a first electrical conductor and an insulating core having an LAT value of at least 25 lb./mil supporting said first conductor.
Dependencies are inferred from the claim text.