Patent ID: 6322711
Filing Date: 2001-11-27
Classification: H01C,H01L

Abstract:
A method for forming a discrete thin film resistor comprising:providing an insulator substrate having an upper surface and a lower surface;scribing lateral and horizontal scribe lines in the upper surface of the insulator substrate to form a bi-directional array of insulator islands;forming a blanket thin film resistive layer upon the upper surface of the insulator substrate through a thin film deposition method;forming a patterned conductive lead layer on the top and bottom surfaces of the insulator substrate;stabilizing the thermal coefficient of resistivity of the blanket thin film resistive layer;patterning the blanket thin film resistive layer through a non-photolithographic energy beam etching method to form a bi-directional array of isolated thin film resistive layers upon the bi-directional array of insulator islands;trimming the isolated thin film resistive layers through a non-photolithographic energy beam etching method to form a bi-directional array of thin film resistors;sealing the surface of the trimmed thin film resistive layer with a patterned overcoat sealant layer;parting a strip of the bi-directional array insulator islands from the substrate along the lateral scribe line;forming a patterned bridging conductor lead layer between the corresponding upper and lower lead layers on the parted strip of insulator islands;parting the insulator islands from the parted strip of islands along the horizontal scribe lines;forming a bondable surface on the bridging conductor lead layers.