Silicon wafer 4inch N-type 0.002~0.004Ω Oxide Layer 280nm Semiconductor Substrate
♦️ High-quality silicon wafer for Research and Experiment.
♦️ Provide small quantities, special specifications products, and customized services.
Silicon Wafer Specification:
- Size: 4inch;
- Method: CZ;
- Type: N;
- Dopant: As;
- Resistivity: 0.002~0.004Ω;
- Thickness: 525um±25;
- Oxide film: 280nm (both sides);
- TTV＜10um ;
- Surface: polished;
- Backside: etched;
- Packing: silicon wafer case ;
1.What products does the company mainly provide?
- Semiconductor substrates
- Solar energy products
- Ceramics products
- Processing services
2.Where do the company's products and services come from?
Our partners mainly include the United States, Germany, Japan, China and other countries and regions. In addition to stock products, we can also provide customized processing services
1.Do you ship worldwide?
Yes, we ship worldwide and we use Fedex, DHL and other express companies.
2. Where you ship goods from ?
Normally we ship the goods from China. meanwhile we have also warehouse in Japan. It depends on the situation as needs.
3.What is the shipping cost ?
The freight in North America, South America and Europe is generally US$30-40
The shipping fee in Asia is generally 20-30 US dollars
Free shipping for products purchased above a certain amount, please contact us for details
4. What is the shipping time ?
The time frame for order delivery is divided into two parts:
- Processing time: Order verification, tailoring, quality check and packaging. All orders are sent to the manufacturers for dispatch within 24 hours after the order is placed. If the products are in stock, which takes an additional 2–4 days (except holidays).
- Shipping time: We use Fedex, DHL and other express companies, and the shipping time is generally 4-6 days.
5. How do I track my package?
You can track your parcel via the Confirmation Email. Also, you can click “Track my Order” link on our website.
Payment & Ordering
1.What payment terms you can accept?
We can accept Paypal, Google Pay, Apple Pay, Visa, Mastercard, and American Express.
We can also accept bank transfers, including USD, EUR, GBP, JPY, KRW, etc.
2. My payment was declined, why?
If your credit card is declined there may be a few reasons why: the card has no funds available, you entered the wrong CSV security code, the card is expired, you entered the wrong billing information, the card does not allow internet purchases (card not present purchases), there is a hold on the card. In any event by calling your issuing bank they can tell you why the card is declining.
Solutions: try a different credit card or try using PayPal as your checkout method (they accept VISA, MasterCard, American Express and Diners Club.
3.How do I cancel my order?
Only unshipped orders may be cancelled. Cancellation may be done either through email or by telephone. Refund will be issued accordingly if card is charged.
4. Is my information is securing using this site?
Absolutely!!! Our Secure Software (SSL) is the industry standard and among the best software available today for secure commerce transactions. It encrypts your credit card number so that it cannot be read as the information travels over the Internet.
5.What if my address is wrong?
If your dress is not available, we will send you an email and/or call you. Please be sure to check your email within 24 hours of placing your order. We will do everything we can to fufill your order.
Return & Refunds
1.What items are returnable?
- Within 7 days of after receiving goods
- Products with quality problems
2.How do I return a product?
Once you have alerted us you wish to make a return through an email contact. We will contact you to start the return process.
3. What is your refund policy?
Our complete return policy is located at the RETURNS link at the bottom of the site
4.How will you refund me ?
You can find our refund policy by the link The refund will go back onto the same card you used to place the order with us, and will be paid back to you via a return transaction. Please allow 3-5 days for the funds to show in your account.
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Contact person: Kim