An integrated circuit structure including multiple thin film resistors
having different sheet resistances and TCRs includes a first oxide layer
(2) formed on a semiconductor substrate (1), a first thin film resistor
(3) disposed on the first oxide layer (2), and a second oxide layer (14)
disposed over the first oxide layer (2) and first thin film resistor (3).
A second thin film resistor (15) is formed on the second oxide layer (14)
and a third oxide layer (16) is formed over the second thin film resistor
(15) and the second oxide layer (14). Interconnect metallization elements
(12A,B & 22A,B) disposed on at least one of the second (14) and third
(16) oxide layers electrically contact the circuit element (4), terminals
of the first thin film resistor (3), and terminals of the second thin
film resistor (15), respectively, through corresponding contact openings
through at least one of the second (14) and third (16) oxide layers.