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Amkor packages and tests computer chips for other companies, turning fragile silicon wafers into finished parts that can go into phones, cars, and computers.
Amkor Technology is the world's largest "outsourced" chip packager. Chipmakers like TSMC and Samsung etch microscopic circuits onto silicon wafers, but those bare wafers are fragile, tiny, and useless on their own. Amkor takes the finished wafers, cuts them into individual chips, wraps each one in protective plastic or ceramic, and connects it to the outside world with tiny wires or solder bumps. That packaging lets the chip survive heat, moisture, and the physical stress of being dropped into a phone or bolted under a car hood.
The company makes money by charging chipmakers for this assembly and testing work. It doesn't design chips or own famous brands; it is the back-end factory that chipmakers and their customers rely on. Amkor runs plants in Asia, including in China, Taiwan, South Korea, Japan, and Vietnam, and it has a growing presence in the United States. Its customers are the big chip companies and the electronics firms that need chips packaged for phones, cars, and data centers. There's a strategic shift underway. As chips get more complex, advanced packaging has become a bottleneck and a source of competitive advantage. Amkor has been investing heavily in "advanced packaging" technology that stacks chips or connects them in dense arrays, which is crucial for artificial intelligence and high-performance computing. The company also announced plans for a major packaging facility in Arizona, partly to serve U.S. customers who want a domestic supply chain for chips. That project is expensive and carries execution risk — building factories takes years and big capital spending — but it puts Amkor closer to its most important customers. The business is cyclical and capital-hungry. When phone and PC sales slow, Amkor's utilization drops and profits shrink fast. When demand surges, the company can earn good margins, but it must keep spending on plants and equipment to stay competitive. Rivals include bigger chipmakers that do their own packaging and other outsourced packaging firms. Amkor's scale and long relationships are real strengths, but the industry's swings and the heavy cost of staying at the cutting edge mean the company is always to some degree at the mercy of the chip cycle.
Saved answer · last researched 21 Oct 2026
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