Patent ID: 11971760
Assignee: APPLE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A printed circuit having a range of operating temperatures and configured to receive a surface-mount electrical component that produces resistive heating in the printed circuit, the printed circuit comprising:
stacked dielectric layers;
stacked metal layers interleaved with the stacked dielectric layers;
a substrate having a thickness less than 50 microns;
a first contact pad and a second contact pad on the substrate; and
a conductive trace on the substrate that extends from the first contact pad to the second contact pad, the conductive trace having a resistance that varies linearly as a function of temperature across the range of operating temperatures of the printed circuit, and the conductive trace having a length that configures the conductive trace to exhibit a nominal resistance at a predetermined temperature.