Powertech Technology Inc. (PTI) is a Taiwan-based outsourced semiconductor assembly and test company best known for packaging and testing DRAM and NAND flash memory. It is expanding beyond conventional memory back-end services into HBM, TSV, 2.5D/3D integration, FOPLP and other advanced packaging technologies used in AI servers.
This article explains what PTI does, its relationship with Kingston, its main services and locations, competitors and recent financial performance based primarily on company information available in 2026.
PTI in brief
- One of Taiwan’s major OSAT providers
- Strong in DRAM and NAND flash assembly and testing
- Investing in HBM, TSV, 2.5D/3D packaging and FOPLP
- 2025 revenue of NT$74.929 billion and more than 18,000 employees worldwide
What is PTI?
Founded in 1997, PTI provides outsourced semiconductor assembly and testing. OSAT companies receive processed wafers or dies from semiconductor manufacturers and fabless chip companies, package the chips, test their electrical performance and prepare them for shipment.
| Company | Powertech Technology Inc. |
|---|---|
| Chinese name | 力成科技股份有限公司 |
| Abbreviation | PTI |
| Founded | 1997 |
| Headquarters | Hukou Township, Hsinchu County, Taiwan |
| Chairman | D.K. Tsai |
| CEO | Boris Hsieh |
| Employees | More than 18,000 worldwide |
| Market | Taiwan Stock Exchange |
| Ticker | 6239 |
| Services | Bumping, wafer probing, IC assembly, final testing, burn-in and module assembly |
Sources: PTI company profile and PTI management team.
Memory semiconductor back-end services
Semiconductor production is commonly divided into wafer fabrication and back-end assembly and testing. PTI specializes in the latter and has built particular expertise in DRAM and NAND flash memory.
- Bumping: forming microscopic interconnects between a chip and substrate
- Wafer probing: electrically testing dies while they remain on the wafer
- IC packaging: wire-bond BGA, flip-chip and wafer-level packaging
- Final test and burn-in: checking function and long-term reliability
- Module assembly: assembling products such as SSDs and system-in-package modules
This memory concentration exposes PTI to DRAM and NAND market cycles, but it also provides opportunities as memory suppliers outsource increasingly complex packaging and test processes.
HBM and advanced packaging for AI
AI servers require not only GPUs and other compute chips but also high-bandwidth memory. HBM stacks multiple DRAM dies and relies on TSVs and fine-pitch interconnects, making assembly and testing more demanding than conventional memory packaging.
PTI’s 2025 annual report discusses development involving HBM stacking and testing, TSVs, large multi-chip-module FCBGA, chiplet FCBGA, SiP/SiM and fan-out panel-level packaging. Research and development expenditure was approximately NT$2.8 billion in 2025, equal to 3.74% of consolidated revenue.
| Technology | Role |
|---|---|
| HBM and TSV | High-density stacked memory for AI and high-performance computing |
| 2.5D/3D integration | High-density connections among compute dies, memory and chiplets |
| FOPLP | Panel-level processing intended to improve area and cost efficiency |
| FCBGA and chiplet FCBGA | Packaging for large, high-performance AI and server chips |
| SiP and SiM | Combining multiple functions in one package or module |
Is PTI owned by Kingston?
PTI is not a Kingston Technology subsidiary. Kingston is a PTI shareholder and nominates directors, and the two companies have long-standing capital and management ties. PTI Chairman D.K. Tsai and CEO Boris Hsieh also have experience at Kingston-related companies. PTI is best described as an independent listed company with a close relationship with Kingston.
Manufacturing locations and group companies
| Region | Main locations or companies | Role |
|---|---|---|
| Taiwan | Hukou, Hsinchu Science Park and Miaoli | Main PTI, TeraPower and Greatek production operations |
| Japan | Akita, Kumamoto and Yokohama | Assembly and testing through Powertech Technology Akita and Tera Probe |
| China | Suzhou | Equity-method interest in Longforce Technology |
PTI established the Xi’an operation under a Micron agreement in 2014, but the asset transfer was completed in June 2024 after the contract ended. The former Powertech Technology (Suzhou) ceased to be controlled by PTI in 2023 and was renamed Longforce Technology (Suzhou). Older references to these sites as consolidated PTI factories therefore require qualification.
See the official PTI location list and our Micron Technology guide.
Financial performance
Consolidated revenue rose 2.2% to NT$74.929 billion in 2025, while net income attributable to owners fell 18.45% to NT$5.536 billion. Comparisons are affected by the removal of Xi’an factory revenue from consolidation after July 2024.
| Year | Revenue | Net income attributable to owners | EPS |
|---|---|---|---|
| 2023 | NT$70.441bn | NT$8.009bn | NT$10.72 |
| 2024 | NT$73.315bn | NT$6.788bn | NT$9.09 |
| 2025 | NT$74.929bn | NT$5.536bn | NT$7.48 |
Revenue for January through June 2026 totaled NT$44.430 billion, up 32.41% year on year. AI and HPC demand and advanced packaging provide growth opportunities, while capital spending, production yields, memory pricing and customer concentration remain important risks.
Sources: PTI annual reports and June 2026 revenue announcement.
PTI vs. ASE and Amkor
| Company | Positioning | Difference from PTI |
|---|---|---|
| PTI | Memory assembly and test, expanding into HBM and advanced packaging | Greater specialization in memory |
| ASE Technology Holding | One of the world’s largest OSAT groups, also operating an EMS business | Larger scale and broader business scope |
| Amkor Technology | Global advanced, automotive and communications packaging | Broad production network across Korea, Southeast Asia and Japan |
What to watch
- HBM production: yields, customer qualification and revenue contribution
- Advanced-packaging mix: growth in 2.5D/3D, FCBGA and FOPLP
- Memory cycle: DRAM and NAND inventories and pricing
- Capital expenditure: depreciation and profitability during investment phases
- Consolidation changes: comparisons after the Xi’an asset transfer
Frequently asked questions
What does PTI do?
PTI is a Taiwan-based OSAT company that packages, assembles and tests DRAM, NAND flash and other semiconductors. It is also developing HBM and 2.5D/3D packaging capabilities.
Does PTI manufacture semiconductor wafers?
Its core business is not wafer fabrication. PTI specializes in the back-end processes that package and test dies after the wafer-fabrication stage.
Is PTI a Kingston subsidiary?
No. Kingston is a shareholder with close capital and management ties, but PTI remains an independently listed company.
Summary
PTI is a major Taiwan OSAT provider whose established strength is memory semiconductor assembly and testing. Its next growth stage depends on converting HBM, 2.5D/3D and panel-level packaging investment into stable production and profitable revenue. Investors and industry observers should assess these opportunities together with memory-cycle exposure, capital intensity and changes in the consolidated business perimeter.
