Agere Systems Guardian Corp.

Jaseph R Radosevich

Sailesh Mansinh Merchant

Pradip Kumar Roy

Isik C Kizilyalli

Richard William Gregor

The present invention provides a unique a resistor formed on a semiconductor substrate. The resistor preferably comprises a first resistor layer that includes a first metal silicide, such as tungsten silicide, and nitrogen and that is formed on the substrate. The first layer has a first thickness and a concentration of nitrogen incorporated therein. The nitrogen concentration may be varied to obtain a desired resistive value of the resistor. Thus, depending on the concentration of nitrogen, a wide range of resistive values may be achieved. The resistor further comprises a second resistor layer with a second thickness that includes a second metal silicide and that is formed on the first resistor layer. Thus, the present invention provides a metal silicide-based resistor having nitrogen incorporated therein which allows the resistance of the resistor to be tailored to specific electrical applications. Yet at the same time, the resistor is far less susceptible to temperature and voltage variation than conventional diffused resistors and, thereby, provides a more precise resistor.

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Orlando, FL, United States of America

Jaseph R Radosevich