U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Process for preparing printed circuits

Patent 4722765 Issued on February 2, 1988. Estimated Expiration Date: Icon_subject December 23, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3181986

3324014

Metal-clad laminates
Patent #: 3984598
Issued on: 10/05/1976
Inventor: Sarazin ,   et al.

Transfer lamination of vapor deposited foils, method and product
Patent #: 4357395
Issued on: 11/02/1982
Inventor: Lifshin ,   et al.

Transfer lamination of copper thin sheets and films, method and product
Patent #: 4383003
Issued on: 05/10/1983
Inventor: Lifshin ,   et al.

Printed circuit material
Patent #: 4394419
Issued on: 07/19/1983
Inventor: Konicek

Laminate product of ultra thin copper film on a flexible aluminum carrier Patent #: 4431710
Issued on: 02/14/1984
Inventor: Lifshin ,   et al.

Inventors

Application

No. 06/946115 filed on 12/23/1986

US Classes:

216/16, Forming or treating resistive material156/233, Metal foil lamina156/249, And assembly with different lamina174/256, With particular material174/257, Conducting (e.g., ink)174/258, Insulating216/20, Adhesive or autogenous bonding of self-sustaining preforms (e.g., prefabricated base, etc.)216/36, Removing at least one of the self-sustaining preforms or a portion thereof29/846, Manufacturing circuit on or in base428/601, Discontinuous surface component428/632, Oxide-containing component428/674Cu-base component

Examiners

Primary: Powell, William A.

Attorney, Agent or Firm

International Classes

H05K 1/16 (20060101)
H05K 3/20 (20060101)
H05K 3/38 (20060101)
H05K 1/03 (20060101)
H05K 1/09 (20060101)

Foreign Application Priority Data

1983-06-22 DE

Abstract

The present invention describes an improved reverse lamination process for reparing printed circuits with resistors, conductor strips and/or contacts integrated in the circuit. A separating layer is applied on a metallic intermediate carrier. The intermediate carrier thus coated is then printed with a conductive paste in a desired. mirror-inverted layout to provide the resistors, conductor strips and/or contacts. This is followed by the lamination which is carried out under temperature effect and under pressure, the thus laminated package comprising the intermediate carrier, an intermediate layer and the final substrate. The intermediate carrier is subsequently removed, and the separating layer is etched off. The separating layer acts as a parting agent to permit easy mechanical separation and reuse of the metallic intermediate carrier.

PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
PatentsPlus: add to cart
PatentsPlus: add to cartIntelligent turbocharged patent PDFs with marked up images
$16.95more info
 
Sign InRegister
Username  
Password   
forgot password?