A temperature-sensing diode has an anode and a cathode disposed on top and an
isolated,
metallization layer on bottom of a diode die. For example, the temperature-sensing
diode is a Schottky diode without a guard ring and any passivation, making the
temperature-sensing diode inexpensive to fabricate, easy to attach in close proximity
to a heat-generating device and resistant to electronic noise from high power devices
and stray electronic signals. The location of the anode and cathode on the same
surface of the diode package provides for easy connection, such as by wire bonds,
with an external circuit for providing a constant forward bias current and for
amplification of the output voltage signal by an operational amplifier. The isolated,
metallization layer provides for easy attachment of the temperature-sensing diode
in close proximity to heat-generating power devices. A dielectric film isolates
the temperature-sensing diode from the metallization layer and underlying substrate.