Trimmable resistors with reducible resistance and method of manufacture
Patent 5428339 Issued on June 27, 1995. Estimated Expiration Date: 
November 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 1, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2758256 2878357 Circuit assembly as for a T-element Step adjustable attenuator Apparatus and method for providing improved resistive ratio stability of a resistive divider network Patent #: 4859980 InventorAssigneeApplicationNo. 146579 filed on 11/01/1993US Classes:338/195, Resistance value varied by removing or adding material29/620, Coating resistive material on a base29/621, Applying terminal338/295, PLURAL RESISTANCE ELEMENTS CONNECTED BY A JUMPER OR SPACER338/306, WITH BASE EXTENDING ALONG RESISTANCE ELEMENT338/309Terminal coated onExaminersPrimary: Lateef, Marvin M.Attorney, Agent or FirmInternational ClassH01C 010/10AbstractA trimmable resistor which is prepared with additional electrical contacts between the resistor and the substrate. These contacts are usually not connected electrically to the electronic circuit. Moreover, they do not extend across the entire width of the resistor. If the resistor is over trimmed, its resistance can be reduced by wire bonding a selected one of the additional electrical contacts to an end contact of the resistor. Multiple contacts may be placed along the substrate, both on the side of the resistor where trimming is to take place and on an opposite side.Other References
Field of SearchResistance value varied by removing or adding materialPLURAL RESISTANCE ELEMENTS CONNECTED BY A JUMPER OR SPACER WITH BASE EXTENDING ALONG RESISTANCE ELEMENT Resistance element and/or terminals printed or marked on base Resistance element coated on base Terminal coated on Resistance element extends through base Resistance element mounted in a groove in base Terminal extends in or through base Terminal embraces base Resistance element and base formed in layers Resistor making Coating resistive material on a base Applying terminal | |
