CompanyGraph
Jcet Group Co., Ltd.
600584 · SSE · China
Takes raw chips from foundries and assembles them into finished, tested packages that electronics and car makers can actually use.
JCET Group takes bare silicon dies from chipmakers and packages them into finished chips by placing and bonding each die at sub-micron accuracy — a margin so tight that an error of a few micrometers makes the chip useless and cannot be fixed afterward. Reaching that accuracy requires technicians to calibrate each bonding machine individually at JCET's facilities in Jiangsu Province, South Korea, and Malaysia, so buying more machines adds capacity but not precision unless trained people are there to set them up. Automotive customers then spend 12 to 18 months qualifying those specific sites, specific package designs, and specific test flows under the IATF 16949 standard, which means their approval is tied to JCET's exact process at an exact location — a competitor with identical equipment still cannot inherit that qualification. The main thing that could unwind this is U.S. export controls: if equipment vendors lose authorisation to service the TSV and WLCSP lines at the Jiangsu facilities, the calibrated state of those machines degrades, the automotive qualifications tied to those parameters become invalid, and customers face restarting an 18-month approval process at sites they have never certified.
How does this company make money?
The company charges a per-unit fee for every chip it assembles and tests, with the price depending on how complex the package is and how extensive the testing needs to be. It also earns separate engineering service fees when customers need a custom package design or a new test program created for a specific chip.
What makes this company hard to replace?
Automotive customers must complete a 12-to-18-month IATF 16949 requalification any time they move to a new packaging supplier, and that process approves a specific site's exact process parameters — not a general capability. Existing customers have also qualified specific package designs and test flows that would require significant engineering redesign to move elsewhere. Transferring production to a new supplier also means handing over proprietary assembly process parameters and test software built specifically for each chip design.
What limits this company?
Each wire bonding machine can only process a fixed number of chips per hour, and pushing it faster causes connection failures. The only way to grow output is to add more machines and recalibrate each one using skilled technicians — a process that cannot be rushed. Capital can buy new equipment, but it cannot buy the calibrated accuracy that only trained people, working with specific machines over time, can build.
What does this company depend on?
The company cannot operate without bare semiconductor dies from foundries like TSMC and SMIC, gold and copper bonding wire from specialised suppliers, lead frames and substrate materials from packaging component manufacturers, electronic design automation software licenses used to build test programs, and active ISO 14001 and IATF 16949 certifications that allow automotive customers to qualify its facilities.
Who depends on this company?
Consumer electronics makers like Xiaomi and Oppo would face assembly line shutdowns if packaged mobile processor deliveries stopped. Automotive tier-1 suppliers would halt production of engine control modules and ADAS systems without packaged automotive-grade chips. Telecommunications equipment makers like Huawei would be unable to finish base station builds without packaged RF and baseband processors.
How does this company scale?
Test software and packaging design methods, once developed for one facility, can be copied to others without much added cost, so engineering work done once supports higher volumes cheaply. What does not scale easily is the physical assembly itself: every wire bonding and die attach machine needs individual calibration by skilled technicians who take years to train, so throughput bottlenecks persist even when more machines are purchased.
What external forces can significantly affect this company?
U.S. export controls already restrict technology transfers to Chinese semiconductor companies, limiting which equipment the Jiangsu facilities can buy or have serviced. Chinese government policies pushing domestic semiconductor self-sufficiency are reshaping which suppliers customers are required to use. The shift toward electric vehicles is also forcing the development of new packaging solutions for high-power chips that must survive harsh heat and vibration inside cars.
Where is this company structurally vulnerable?
The TSV and WLCSP assembly lines depend on specialised tooling and regular service from equipment vendors. If U.S. export controls revoke those vendors' authorisation to service or upgrade equipment at the Chinese facilities, the machines drift out of calibration. Once calibration fails, the automotive qualifications tied to those specific process parameters become invalid, and every affected customer must restart a 12-to-18-month IATF 16949 requalification at sites they have not yet approved.