The bulk metal foil resistor was first developed by Dr Felix Zandman (who went on to found Vishay) in the early 1960’s and is now a mainstream resistor technology. In this post, we compare the performance of bulk metal foil resistor technology with thick film.
The bulk metal foil manufacturing process involves attaching a bulk metal foil to a ceramic substrate using an adhesive. A photoetching process is then used to form the resistor pattern. The final step is to adjust the resistor value and tolerance using a laser.