The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1990
Filed:
Sep. 08, 1989
Applicant:
Inventors:
Patrice Deroux-Dauphin, Saint Egreve, FR;
Henri Sibuet, Saint Egreve, FR;
Thierry Dupeux, Saint Martin d'Heres, FR;
Assignees:
Commissariat a l'Energie Atomique, Paris, FR;
Compagnie Europeenne de Composants Electroniques LCC, Courbevoie, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01K / ;
U.S. Cl.
CPC ...
29852 ; 204 15 ; 21912168 ; 21912169 ; 437173 ;
Abstract
According to the invention, blind holes (27) and not through-holes are produced. For this purpose, the substrate (10) to be pierced or perforated is previously covered with a layer (12) less absorbing for the laser perforating beam (26) than the substrate. Application to the production of electronic circuits, magnetic recording devices, etc.