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:
Aug. 12, 2014
Filed:
May. 11, 2007
Xueren Zhang, Singapore, SG;
Andrea Lorenzo Vitali, Bergamo, IT;
Federico Giovanni Ziglioli, Via Adamello, IT;
Bruno Biffi, Codogno, IT;
Tong Yan Tee, Singapore, SG;
Xueren Zhang, Singapore, SG;
Andrea Lorenzo Vitali, Bergamo, IT;
Federico Giovanni Ziglioli, Via Adamello, IT;
Bruno Biffi, Codogno, IT;
Tong Yan Tee, Singapore, SG;
STMicroelectronics Asia Pacific Pte, Ltd., Singapore, SG;
Abstract
A force sensor to measure a force from a load includes a plunger, a flexible disc-shaped membrane, a support plate and a silicon die. The plunger is configured to receive the force from the load, and has a ring-shaped groove at the lower surface. The membrane has a ring-shaped upper bump at the upper surface configured to complementarily fit into the groove at the lower surface of plunger and a ring-shaped lower bump at lower upper surface. The support plate has a ring-shaped groove for complementary fit into the lower bump on the lower surface of the membrane. The silicon die is centrally mounted on the membrane and comprises piezo-resistors with resistance that varies when deformed by the force. Force received by the plunger is transmitted to the membrane, causing the membrane to flex and bending or compressing of the silicon die, resulting in the measurement of the force.