Is there any place in Jinan that can process circuit boards?

The working principle of a capacitive screen
The basic working principle of a capacitive screen is: a person is an imaginary grounded object (zero potential body), and a very low voltage is applied to the working surface. When the user touches the screen, the finger absorbs a A very small current flows out from the electrodes at the four corners or sides of the touch screen. Theoretically, the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller controls the current flow by proportioning the four currents. Precise calculations are used to determine the position of the touch point. The capacitive screen and electrostatic induction require a conductor to contact the screen to react. Therefore, no force is required, and the screen can be recognized as long as the finger touches the screen lightly. Then, ordinary stylus pens cannot be used for capacitive screens. Capacitive screens have special stylus pens with static electricity.
The advantage of capacitive screen is that it is sensitive and supports multi-touch, making it more suitable for entertainment and playing games.
The disadvantage is that it cannot be positioned accurately. For example, when editing a document, it is not easy to accurately click on a word or punctuation mark to edit it.
Zhongtian Yuan Circuit Board Co., Ltd. is a high-tech enterprise in Zhengzhou specializing in the R&D, production and processing of B circuit boards, multi-layer printed boards, and aluminum substrates
We have always put quality first and customer first. As our service tenet, we provide you with considerate service. We welcome customers and friends to call us for consultation and purchase negotiation!
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