“If anyone hits Taiwan, or there is a serious disruption . . . the tech and electronics industry worldwide is basically screwed,” says the founder of chip provider MA-tek in Financial Times (June 1, 2023). Taiwan is best known for making cutting-edge semiconductors. But its companies also turn out other crucial components from printed circuit boards to advanced camera lenses and they run huge device assembly operations in China. This has created a triangle of critical interdependence between Taiwan, China and the US that has deepened even as tensions have risen.

To understand, let’s look at the iPhone. It is one of the most successful consumer devices of all time: 2.4 billion sold since its launch in 2007, racking up over $1 trillion in revenue for Apple. Its success rests on a sprawling Asian supply chain producing chips, displays, speakers and more on an almost unimaginable scale. At its heart lie both mainland China and Taiwan. Each iPhone needs some 1,500 different components. Nearly 70 per cent of Apple’s top suppliers, making everything from processors to casings, are based in either China (26%), Taiwan (23%) or the US (18%).
The most valuable components — including core processors, 5G modems, Wi-Fi chips, and premium camera lenses — are made inTaiwan. All told, the island’s suppliers account for nearly $200 of the total materials bill for each iPhone. These chips, however, are designed by Apple, or otherU.S., Japanese or European chip developers, such as Qualcomm, Sony, and Bosch.
Chinese suppliers are concentrated in less technologically demanding areas, like product assembly and mechanical parts. The number of China-based suppliers has overtaken all other countries to become the largest source over the past few years. They have also started to move up the supply chain, and now make some of the advanced OLED screens for iPhones. China is also where 95% of all iPhones are assembled, a figure that has changed little since its launch. The country is a major market for Apple, too, providing 1/5 of its total annual revenue. Complicating the picture is the fact that many Taiwanese and U.S. suppliers serve Apple from hundreds of facilities in mainland China.
Without any of these components, an iPhone would not be an iPhone. But a formula that has worked for 15 years is being put to the test as geopolitical tensions rewrite the rules of tech manufacturing.
Classroom discussion questions:
- Western nations this month vowed to “reduce excessive dependencies in our critical supply chains.” How can they do this?
- What has brought this supply chain issue to a head?


