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:
Apr. 04, 2006
Filed:
Jul. 08, 2004
Edward B. Harris, Fogelsville, PA (US);
Canzhong He, Emmaus, PA (US);
Che Choi Leung, Bethlehem Township, Northampton County, PA (US);
Bruce W. Mcneill, Allentown, PA (US);
Edward B. Harris, Fogelsville, PA (US);
Canzhong He, Emmaus, PA (US);
Che Choi Leung, Bethlehem Township, Northampton County, PA (US);
Bruce W. McNeill, Allentown, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
The specification describes matched capacitor pairs that employ interconnect metal in an interdigitated form, and are made with an area efficient configuration. In addition, structural variations between capacitors in the capacitor pair are minimized to provide optimum matching. According to the invention, the capacitor pairs are interdigitated in a manner that ensures that the plates of each pair occupy common area on the substrate. Structural anomalies due to process conditions are compensated in that a given anomaly affects both capacitors in the same way. Two of the capacitor plates, one in each pair, are formed of comb structures, with the fingers of the combs interdigitated. The other plates are formed using one or more plates interleaved between the interdigitated plates.