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:
Dec. 05, 1995
Filed:
Apr. 11, 1994
Tsuneo Kawai, Yokohama, JP;
Takao Nakamura, Yokohama, JP;
Tsuyoshi Fujita, Yokohama, JP;
Minoru Tanaka, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A chip carrier has an electrically insulating substrate with through holes and a multilayer structure formed on the substrate. The multilayer structure includes an electrical conductor pattern for electrical connection with through hole conductors provided in the through holes and for electrical connection with an IC chip. The through hole conductors have their ends protruding from one surface of the substrate on which registration layers are formed for electrically interconnecting the through hole conductors and the electrical conductor pattern in the multilayer structure. The surface of the protruding end of each of the through hole conductors is generally continuously convexly curved and has a maximum height at or in the vicinity of its central portion with the height being measured from the surface of the substrate.