Browse Prior Art Database

IMPROVED MATCHED RESISTOR MANUFACTURE

IP.com Disclosure Number: IPCOM000005732D
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2001-Oct-31
Document File: 1 page(s) / 65K

Publishing Venue

Motorola

Related People

Authors:
Dervin L. Flowers Carl D'Acosta

Abstract

In many cases integrated circuit devices require a pair of resistors, matched as closely as possible in value to meet the requirements of the circuit. This has frequently been attempted using doped polysilicon which is later photolithographically patterned to form the resistor structures of the appropriate physical geometry. The yield of pairs matched to the device requirements is often significantly less than 100% resulting in severe device yield losses. The goal of this study was to have resistor pairs matched to within one percent and overall have resistor values, chip to chip and wafer to wafer match within ten percent for the circuit to operate.