High Frequency PCB

High Frequency PCB

What is High Frequency (HF) PCB?

Electronic devices with high frequency is the developing tendency nowadays, especially in wireless network. Satellite communication growing rapidly, information products move towards high speed and high frequency. Thus developing new products always need to use high frequency substrate, satellite system, mobile telephone receiving base station and so on, these communication products must use high frequency PCB.

The features of Thick Copper PCB.

DK should be small and stable enough, usually the smaller the better, high DK may lead to signal transmission delay.

DF should be small, which mainly affect quality of signal transmission, the smaller DF could make smaller signal wastage accordingly.

The thermal expansivity should be the same with copper foil as much as possible, because the difference will lead to copper foil separated in the changes of cold and heat.

Water absorptivity must be low, high water absorptivity will affect DK and DF when in the wet environment.

Heat resisting property, chemistry resisting, impact endurance, peel off resisting must be good.

Materials used for HF circuit board.

High-frequency board for wireless applications and data rates in the upper GHz range have special demands on the material used:

Adapted permittivity.

Low attenuation for efficient signal transmission.

Homogeneous construction with low tolerances in insulation thickness and dielectric constant.

Generally speaking, high frequency can be defined as frequency above 1GHz. Currently, PTFE material is widely used in high frequency PCB China manufacturing, it's also called Teflon, which frequency is normally above 5GHz. In addition, FR4 or PPO substrate can be used to the product frequency among 1GHz~10GHz. These three high frequency substrate have below differences:

With regard to laminate cost of FR4, PPO and Teflon, FR4 is the cheapest one, while Teflon is the most expensive one. In terms of DK, DF, water absorption and frequency feature, Teflon is the best. When product application require frequency above 10GHz, only can we choose Teflon PCB  substrate to manufacture. Obviously, the performance of Teflon is far better than other substrate, However, Teflon substrate has the disadvantage of high cost and large heat resisting property. In order to improve PTFE stiffness and heat resisting property function, a large number of SiO2 or fiber glass as the filling material. On the other hand, due to molecule inertia of PTFE material, which it is not easy to combine with copper foil, thus, it needs to do special surface treatment on the combination side. With regard to combination surface treatment, normally use chemical etching on PTFE surface or plasma etching to plus surface roughness or add one adhesive film between PTFE and copper foil, but these may have influence on dielectric performance.

Free PCB quotation is just a click away. Click below button to enter our PCB Price Calculator, fill out your custom PCB spec, and rough PCB price will show up in the right column automatically (shipping price will be given on order confirmation page).

Pcbmain’s responsibilities:

1. Protecting all data generated by and provided to us by our users from being stolen, compromised, or used in violation with this policy.

2. Never selling user-provided and user-generated data for financial gain or competitive advantage.

3. Providing transparency for our users into what data we collect and what we do with it including what access third parties have to user data and for what purpose.

4. Informing users if their data is compromised, either by failure to protect data or by order to surrender data to a legal authority, to the fullest extent we are lawfully able.

Data we collect from you

If you register an account with PCBmain******, we’ll have access to your e-mail address and any additional contact information you choose to provide us. If you place an order, we retain a record of the contents of the order, delivery and billing address information, and any communication you might have with our sales people or engineering support teams about the order.

If you browse PCBmain******, with or without a login, we know for a limited time that a user at your IP address has visited pages on the site.

We collect data on what products and content you browse in order to offer better value to you through personalized email, and to see which products/content are the most useful to you.

Sending emails to users

We send mail to users when orders are placed, shipped, or ready for local pickup. We may also be in contact when an order requires payment before shipping, or if other issues prevent us from fulfilling an order.

We will notify users if we believe their privacy has been compromised, if it is within our power to do so. For example, if we discover a customer’s account user login information has been exposed elsewhere on the web, or if we are compelled to disclose information to law enforcement.

We may occasionally send you an email that you did not request or trigger with an action of any kind in order to promote a certain aspect of our site, products, or services.

Interaction between PCBmain and user

If you email us, chat with us, or call us on the telephone for support we can and most of the time will record the interaction. This is done so for training and audit purposes and the private conversations between customers and support staff are never sold to or shared with third parties (except when a third party tool, such as email or our chat service, is used to make the interaction possible).

Shipping Providers

We offer shipping through third parties such as DHL, EMS, FedEx, UPS. We pass delivery addresses, phone numbers, and invoices to these companies to the extent required for quoting shipping prices and successful delivery of orders.

Payment Providers

Payments for buying PCBs at PCBmain****** are processed through Paypal. When using PayPal on PCBmain******, a user should provide their PayPal email address. The user will then be directed to paypal****** to complete their payment, after which they will be redirected to PCBmain****** to complete the order. In case you do not have a Paypal account, credit card data including the cardholder name, credit card number, expiration date, CVV, and full billing address are sent to Paypal via an API for processing. Details regarding orders are not sent to Paypal. Each transaction is logged by retaining the transaction amount, the customer’s name, addresses and phone numbers. No any credit card data is stored at any point on PCBmain’s servers.

If you have any questions or feedback regarding this privacy policy, including if you feel PCBmain or someone within the PCBmain community has violated it, or if you are concerned about PCBmain’s general philosophy toward user privacy, please contact us at sales@pcbmain******