[News] Chiang Shang-yi, Former TSMC Co-COO, Shares China Experience and CoWoS Development

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According to Taiwan’s TechNews report, Chiang Shang-yi, former TSMC Co-COO and current Chief Semiconductor Strategist at Foxconn, shared insights during a Taiwan Television interview. He discussed his past role at TSMC, the potential impact of U.S. export restrictions on China’s semiconductor development, and revealed previously undisclosed stories. Chiang emphasized the need to reevaluate China’s approach to semiconductor manufacturing.

Chiang previously stated that he wouldn’t return to China, and when asked about geopolitical challenges in the region due to U.S. chip restrictions, he shared his experiences in China.

He mentioned that his initial focus was primarily on research and development, and while technical challenges were manageable, the most significant challenge was related to human interactions. Chiang also disclosed two instances where he experienced a lack of trust from Chinese authorities.

He explained that the headquarters of SMIC is in Shanghai, with its largest facility located in Beijing. On two separate occasions, senior executives were scheduled to visit the Beijing facility, and Chiang was instructed to participate. However, he was informed just a day prior that he, as a non-Chinese national, would not be allowed to attend these visits. Similar incidents occurred twice, leaving him with a rather uncomfortable impression.

Regarding the U.S. chip ban, Chiang acknowledged that China had invested heavily in semiconductors over the past decade, and the recent restrictions were a more recent development. However, he emphasized that even before the restrictions, China’s semiconductor industry faced challenges and that the way China pursued semiconductor development needed reevaluation.

On the other hand, Chiang discussed why TSMC has been successful, attributing it to its business model and rapid decision-making. He mentioned a proposal he made to establish a packaging unit within TSMC to address the bottleneck created by the end of Moore’s Law. This proposal, referred to as “Advanced Packaging,” was quickly approved by TSMC’s founder, Morris Chang, who provided the resources to make it happen. This initiative led to the development of CoWoS (Chip-on-Wafer-on-Substrate) technology.

However, despite the innovation, CoWoS initially faced challenges gaining business traction and was even considered a joke within the company. Chiang had to work hard to promote the technology to customers. During a dinner with a Qualcomm executive, Chiang learned that CoWoS’s price was too high for consideration, with the executive requiring a price reduction to one cent per minimeter square. Chiang returned to TSMC and urged R&D to lower costs while maintaining performance, eventually leading to the success of InFO (Integrated Fan-Out) technology.

Chiang mentioned that the first customer to embrace CoWoS technology was Huawei, primarily for GPU chips, well before AI applications gained prominence. He humorously credited the Qualcomm executive for saving him with a single sentence and emphasized that innovation needed to be practical, not just technological, to succeed in the industry.