China+1 for semiconductor assembly & test: Vietnam, Malaysia or Taiwan — Where to Put the Factory?

Semiconductor supply chains are shifting out of China — assembly and test (OSAT) is a prime China+1 candidate. The three most-mentioned destinations: Vietnam, Malaysia, Taiwan. Each has its strengths — this article compares them so investors choose right.

1. What does OSAT need most? Evaluation criteria

• Supply cluster: near materials and equipment suppliers — OSAT never stands alone;
• Technical labour: well-trained engineers and technicians — OSAT is technical-labour intensive;
• Tax incentives: CIT and holidays for high-tech;
• Setup speed: from decision to pilot run — faster is better;
• Customer proximity: where the chip designers and OEMs sit.

2. Vietnam: the rising star

• Pro: competitive labour and land costs — cheapest of the three;
• Pro: the electronics FDI wave — Samsung and Intel are present, creating cluster effects;
• Pro: high-tech attraction policies — incentives for big projects;
• Con: the OSAT ecosystem is still young — missing materials and equipment suppliers;
• Con: semiconductor technical labour is scarce — training needed.

3. Malaysia: the mature forerunner

• Pro: a decades-old OSAT ecosystem — Penang is a mature semiconductor cluster;
• Pro: abundant electronics engineers — long-trained;
• Pro: stable infrastructure and logistics — English widely spoken;
• Con: higher costs than Vietnam — land and wages;
• Con: talent competition with Singapore.

4. Taiwan: the industry’s cradle

• Pro: the most complete semiconductor ecosystem — from design to OSAT;
• Pro: top-tier talent — the region’s most seasoned semiconductor engineers;
• Pro: near major customers — leading chip firms;
• Con: the highest costs — land, wages, operations;
• Con: not geographic diversification away from China for every company — weigh your own China+1 goals.

5. Summary comparison

6. US tariff risk: how does it differ?

• Principle: US tariff policy changes — check current rates before deciding;
• Origin: goods assembled in whichever country bear that origin’s duty;
• Anti-circumvention: the US investigates origin “laundering” — see our Vina Solar article;
• Diversification: genuine China+1 — real supply chains, not relabelling;
• Advice: US tariffs are a separate specialty — engage US trade counsel.

7. If you may pick only one: the deciding criterion

• Cost priority: Vietnam — cheapest, accept building the ecosystem;
• Speed + ecosystem priority: Malaysia — plug in and run;
• Technology + customer priority: Taiwan — expensive but solid;
• Common strategy: combine — R&D/high-tech in Taiwan, volume manufacturing in Vietnam;
• No universal answer: depends on the OSAT segment (high-end or commodity).

8. The Chinese-investor angle

• Vietnam: close to China — supply chains and expert travel are convenient;
• Malaysia: neutral — less geopolitical sensitivity;
• Consider: what is your customers’ China+1 goal — diversifying away from where;
• Supply chain: materials and equipment from China — nearer is cheaper;
• Long term: each place’s trade relations with China — monitor.

9. Recommended roadmap

• Step 1: define the OSAT segment — high-end or commodity;
• Step 2: field-survey all three — meet IPs, suppliers, training schools;
• Step 3: compare incentives in writing — not verbal promises;
• Step 4: assess tariff risk with trade counsel;
• Step 5: decide by section 7’s criteria — with an expansion roadmap.

10. Decision checklist

• OSAT segment — high-end or commodity?
• Priority: cost, speed or customer proximity?
• Existing ecosystem — enough or must build?
• Technical labour — hired where?
• US tariff risk — assessed?
• Local counsel in each place — consulted?

11. Semiconductor talent: the hardest problem

• Reality: chip engineers are scarce in all three places — a talent war;
• Vietnam: universities are starting chip programmes — 3–5 years for the first cohorts;
• Solution: in-house training plus seconded experts (Chinese/Taiwanese);
• Retention: pay, equity, career paths — chip engineers get poached;
• Long term: partner with universities — commission training now.

12. Materials and equipment supply

• OSAT needs: leadframes, substrates, test equipment — not made in-house;
• Taiwan: complete — bought same-day;
• Malaysia: mostly covered — many regional suppliers;
• Vietnam: must import — from China, Japan, Taiwan;
• Hidden cost: importing materials — higher logistics + inventory.

13. Power and water: the fab-adjacent needs

• OSAT specifics: test operations need stable, clean power — fluctuations ruin yields;
• Water: ultrapure water for some processes — check local supply;
• Vietnam: industrial parks vary — verify power quality, not just availability;
• Backup: UPS and generators — non-negotiable for test floors;
• Cost: industrial power tariffs differ by country — model them.

14. IP protection in three jurisdictions

• The concern: OSAT handles customers’ chip designs — leaks are existential;
• All three: have IP laws — enforcement quality varies;
• Contracts: NDAs with every employee and supplier — in the local language;
• Systems: access controls, clean rooms, no-phone zones — physical plus digital;
• Advice: local IP counsel in whichever country you pick.

15. Quick answers

• Which is cheapest overall? Vietnam — but add the ecosystem-building cost;
• Which is fastest to revenue? Malaysia — mature ecosystem, plug in;
• Can we do two countries? Yes — many groups run Taiwan + Vietnam splits.

16. Incentives compared properly

• Vietnam: CIT incentives for high-tech, large-scale projects — multi-year holidays;
• Malaysia: Pioneer Status, ITA — mature packages;
• Compare: total tax actually paid over 10 years — not just holiday years;
• Conditions: incentives tied to commitments — capital, jobs, technology;
• In writing: incentives need written decisions — per project.

17. Geopolitical risk: facing it

• Reality: semiconductors are strategic — national policies can shift;
• Export controls: advanced equipment and tech are controlled — check lists;
• Diversify: don’t put everything in one country — China+1 means diversification;
• Monitor: US, China, EU semiconductor policies — stay updated;
• Advice: geopolitical risk — assess with strategy advisers.

18. Site visits: the non-negotiable step

• Go see: never decide on brochures — walk the parks;
• Meet operators: existing OSAT plants share real operating experience;
• Test utilities: measure power quality — don’t trust specs alone;
• Talk talent: visit universities — meet the future workforce;
• Twice: visit before deciding and before signing.

19. Financing the OSAT plant

• Capex: OSAT plants are capital-intensive — test equipment is expensive;
• Phasing: phase the investment — start with one product line;
• Incentives: link disbursement to incentive milestones;
• Local borrowing: Vietnamese banks lend to FDI projects — establish relations early;
• Payback: model conservative ramp-up — yields take time.

20. Final word: the decision framework

• Segment first: high-end or commodity — the segment decides;
• Customers decide: where your customers want you matters most;
• Total cost: 10-year total cost — not year-one;
• Optionality: keep expansion options open — the industry moves fast;
• Act: analysis without decision is just expensive procrastination.

21. Key contacts to line up

• IP developers in all three locations — for real offers, not brochures;
• Tax advisers — for the 10-year total-cost model;
• US trade counsel — for tariff-risk assessment;
• Local counsel in the chosen country — for licensing and incentives.

One last tip: talk to equipment vendors early — their lead times for test handlers and probers often decide your real opening date more than construction does.

Contact us

FLAT Law Firm advises Chinese investors throughout the Vietnam investment cycle — from deal structuring and licensing to operations and compliance. Contact us for advice tailored to your project.

This article has been quality-reviewed by the FLAW AI Legal Council