logo

For the Inventor, By the Inventor

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.:

US 5489465 B1

PDFFull Text
Date of Patent:
Feb. 06, 1996

Filed:

Jun. 03, 1994

Edge seal technology for low dielectric/porous substrate processing

Applicant:
Inventors:

Govindarajan Natarajan, Pleasant Valley, NY (US);

Takeshi Takamori, Spokane, WA (US);

Katharine G Frase, Peekskill, NY (US);

Thomas E Lombardi, Wappingers Falls, NY (US);

Robert A Rita, Wappingers Falls, NY (US);

Assignee:

International Business Machines Corporation, Armonk, NY (US);

Attorneys:

Whitham, Curtis, Whitham & McGinn

Blecker; Ira

Primary Examiner:

Patrick J Ryan

Assistant Examiner:

Abraham Bahta

Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428210 ; 428137 ; 428209 ; 428332 ; 428426 ; 428432 ; 428433 ; 361792 ; 264 56 ; 264 61 ; 264 63 ; 156 89 ;
Abstract

A sealed composite ceramic structure is formed by first forming a plurality of composite green sheets. Each of the green sheets is a composite structure comprising a central portion of partially densifiable material and an outer portion of fully densifiable material. Next, top and bottom green sheets of fully densifiable material are formed. The greensheets are then stacked to form a laminated structure in the following order: the bottom green sheet, the plurality of composite green sheets, and the top green sheet. The substrate laminate is sintered to form the sealed structure having a porous central portion. The composite structure has particular application to ceramic substrates for mounting semiconductor devices requiring low dielectric constant substrates, but the structure also has applications in fluid processing using porous laminated structures. In both applications, the creation of a porous ceramic body with solid, sealed edges and/or external surfaces hold significant advantages.

Find Patent Forward Citations

Natarajan, Govindarajan. (1996). Edge seal technology for low dielectric/porous substrate processing (U.S. Patent No. 5489465). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5489465

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…