Patent ID: 7640652

Claim:
A method of making a current sensing chip resistor, comprising a resistor manufacturing process comprised of a pre-process and a post-process, wherein the pre-process further comprises the following sequential steps: performing a resistor mask layer coating on an aluminum nitride substrate; performing a resistor layer sputtering; removing a resistor mask layer; performing a resistor protective layer coating; performing a conductive layer plating on the aluminum nitride substrate; performing a laser diode separation dicing; performing the post-processing, the post processing comprising the following sequential steps: performing a laser resistance dicing adjustment to adjust the accuracy of the resistance; performing a resistor protective layer printing; performing a marking printing; performing a resistor protective layer baking-to-dry and hardening; performing a primary cutting on the aluminum nitride substrate; performing a side conductor sputtering; performing a secondary cutting; performing a nickel layer plating; performing a tin layer plating; and packaging the apparatus, wherein a thin-film process is used for the resistor manufacturing process and the aluminum nitride substrate, wherein the thin-film process uses a single-side flip chip structure manufacturing process.