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MPI makes the machines and probes that semiconductor companies use to test chips before they are packaged and sold.
MPI Corporation builds the equipment that chipmakers use to check whether their chips actually work. Before a finished chip gets sealed inside plastic and shipped off, engineers need to poke tiny electrical contacts onto it and measure how it behaves. MPI makes the machines that hold the chip in place and the microscopic probes that touch it — essentially the test bench for the semiconductor world.
The company's two main products are probe stations, which are precision platforms that position a chip under a microscope so probes can land on its microscopic pads, and probe cards, which are the interface boards holding those needles. Customers are chipmakers, test houses, and research labs, mostly in Taiwan and across Asia. They buy from MPI because the testing happens at the very start of the manufacturing line, where a single mistake wastes enormous money, so precision and reliability matter more than price. The business rides the same wave as the chip industry itself. Advances like advanced packaging and the boom in AI chips mean more complex testing, and MPI has pushed into higher-end probe cards and thermal systems to capture that demand. Its results rise and fall with semiconductor capital spending, which makes it a cyclical company — good years are very good, and slow years sting.
MPI is a smaller player in a field dominated by bigger names, so it lives on engineering skill and close relationships with Taiwanese chipmakers rather than scale. That gives it a strong seat in the local supply chain but leaves it exposed to any pullback in chip investment.
Saved answer · last researched 15 Nov 2026