Capacitors that utilize a thin tantalum oxide layer as the dielectric material.
Temperature Coefficient of Capacitance (TCC)
The amount of capacitance change in a capacitor with temperature. Expressed as the average change over a certain temperature range in ppm/degree C
Temperature Coefficient of Resistance (TCR)
The amount of resistance change in a resistor (or resistor material) with temperature. Expressed as the average change over a certain temperature range in ppm/degree C.
An environmental test where the device under test is subjected to several temperature changes from a low temperature to a high temperature over a certain period of time.
The rate with which a material is capable of transferring a given amount of heat.
A condition whereby devices are subjected alternately to extreme heat and extreme cold; used to screen out processing defects.
A process involving the use of pressure and temperature to join two materials by inter-diffusion across the boundary.
A film deposited by screen printing "paste" and subsequent firing at high temperature to fuse the paste into its final form.
Thick Film Hybrid Circuit
A hybrid microcircuit that has add-on components, usually chip devices, added to a thick film network to perform an electrical function.
span class="heading3">Thick Film Technology
The technology whereby electrical networks or elements are formed by applying a semi-liquid paste coating through a screen of mask in a selective pattern onto a supporting substrate material and fired.
A thin film (usually less than 100 um thickness) isone that is deposited onto a substrate by an accretion process such as vacuum evaporation, or pyrolytic decomposition, or sputtering.
Top Hat Resistors
Film resistors having a projection on one side allowing a notch to be cut into the center of the projection to form a serpentine resistor and thereby increase the resistivity.
Two similar elements on the same circuit that change values with temperature in close harmony are said to track well. Tracking of different resistors is measured in ppm/deg C (difference). Tracking is also used in reference to temperature hysteresis performance and potentiometer repeatability.
Notching a resistor by abrasive or laser means to raise the nominal resistance value.