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:
Feb. 27, 2007
Filed:
Oct. 05, 2004
Edwin James Harris, Oak Park, IL (US);
Tushar Vyas, Streamwood, IL (US);
Timothy Pachla, Berwyn, IL (US);
James A. Colby, Lombard, IL (US);
Edwin James Harris, Oak Park, IL (US);
Tushar Vyas, Streamwood, IL (US);
Timothy Pachla, Berwyn, IL (US);
James A. Colby, Lombard, IL (US);
Littelfuse, Inc., Des Plaines, IL (US);
Abstract
A voltage variable material ('VVM') including an insulative binder that is formulated to intrinsically adhere to conductive and non-conductive surfaces is provided. The binder and thus the VVM is self-curable and applicable in a spreadable form that dries before use. The binder eliminates the need to place the VVM in a separate device or to provide separate printed circuit board pads on which to electrically connect the VVM. The binder and thus the VVM can be directly applied to many different types of substrates, such as a rigid FR-4 laminate, a polyimide, a polymer or a multilayer PCB via a process such as screen or stencil printing. In one embodiment, the VVM includes two types of conductive particles, one with a core and one without a core. The VVM can also have core-shell type semiconductive particles.