Why Choose FSM?
- Expertise : With a team of seasoned professionals and cutting-edge manufacturing facilities, we consistently deliver wafers of the highest quality.
- Wide Range of Products : Whether you require Czochralski (CZ) and Float Zone (FZ) silicon wafers or SOI and glass wafers, our extensive product lineup is designed to cater to your every need.
- Customization : Our specialty lies in crafting custom wafers tailored precisely to your specifications, ensuring the seamless success of your project.
- Fast Turnaround : Thanks to our streamlined processes and well-stocked inventory, we guarantee swift delivery to keep your projects on track.
- Global Reach : Delivering worldwide from our strategic hubs in China and Japan, we proudly serve a diverse clientele in over 50 countries.

Reclaimed wafers are predominantly employed as dummy wafers (test wafers).
Dummy wafers are frequently utilized in production devices to enhance safety at the outset of the production process and are critical for delivery checks and process evaluation.
Given their role in experimentation and testing, the size and thickness of dummy wafers are crucial factors in most scenarios.


Examples of films used include isolation films for inter-layer separation, metal films for conductivity, and process materials like resist and protective films.


Use Reference Value
Item | Specification | ||
Diameter | 150mm | 200mm | 300mm |
Type | P/N | P/N | P/N |
Notch | SEMI/JEIDA | Notch/OF | Notch |
Thickness(μm) | 675±25/625±25 | 725±25 | 725±25 |
Surface | Polished | Polished | Polished |
Inside | Etched | Etched | Etched |
Package | CoinRoll | CoinRoll | CoinRoll |
150MM/200MM Test Wafer - Perfect for innovative testing applications.
150MM | ||
SPEC | 0.2um≤30ea | |
Diameter(mm) | 150±0.2mm | |
Type | P | |
Olyfra length | 57.5mm±2.5mm | 47.5mm±2.5mm |
Resistance value ( Ω·cm ) | 1-100 | |
Thickness(μm) | SEMI | JEIDA |
675um±25um | 675um±25um | |
TTV(μm) | ≤30um | |
BOW(μm) | ≤40um | |
WARP(μm) | ≤40um | |
Surface impurity | ≤5.0E 10 atom/cm² |
200MM | ||
SPEC | 0.2um≤30ea | - |
Diameter(mm) | 200±0.2mm | |
Type | P | |
Crystal orientation | <110>±1 | |
Notch direction | ||
Resistance value ( Ω·cm ) | 1-100 | |
Thickness(μm) | 725um±25um | |
TTV(μm) | ≤25um | ≤2um |
BOW(μm) | ≤40um | |
WARP(μm) | ||
LM | NO | |
Surface impurity | ≤5.0E 10 atom/cm² |
300MM | ||||
SPEC | 0.045um≤50ea | 0.065um≤50ea | 0.09um<50ea | 0.12um<50ea |
Manufacturing method | CZ | |||
Diameter(mm) | 300±0.2mm | |||
Type/Dopant | P/Boron | |||
Crystal orientation | <100>±1 | |||
Notch direction | ||||
Resistance value (Ω·cm) | 1-100 | |||
Thickness(μm) | 775±25 | |||
TTV(μm) | ≤10 | |||
BOW(μm) | ≤40 | |||
WARP(μm) | ||||
LM | T7+ OCR | |||
Surface impurity | <1 E10 Atoms/cm² |
200MM | 300MM | |
Oxide thickness | 500±25nm | |
Variation in oxide thickness (for one wafer) | <3% | |
Variation in oxide thickness (for multiple wafers) | <3% | |
SPEC | 0.2μm≤30ea | |
Diameter(mm) | 200±0.2mm | 300±0.2mm |
Type | P | |
Crystal orientation | <100>±1 | |
Notch direction | <100>±1 | |
Resistance value (Ω ·cm) | 1-100 | |
Thickness(μm) | 725±25 | |
TTV(μm) | ≤25 | ≤10 |
BOW(μm) | ≤40 | |
WARP(μm) | ≤40 | |
Surface impurity | ≤5.0 E10 Atom/cm² | <1 E10 Atoms/cm² |






Q: What shipping methods are available?
A: We proudly offer a variety of shipping options, including DHL, FedEx, TNT, UPS, EMS, SF, and more.
Q: What are the accepted payment methods?
A: We accept T/T and PayPal as payment methods, along with other options as needed.
Q: How long is the delivery time?
A: For products in stock, expect a swift delivery time of just 5 business days.
For customized orders, delivery is typically within 7 to 25 business days, depending on the quantity required.
Q: Is product customization available to suit my needs?
A: Absolutely! We can tailor the material, specifications, and optical coating of your optical components to meet your specific requirements.
Each customer has unique specifications, and Fine Silicon Manufacturing (Shanghai) Ltd. is dedicated to providing wafers that match your precise needs.