Oct. 18, 2022
1、 Causes and solutions of negative film deformation: Reason: (1) Temperature and humidity control failure (2) The temperature rise of the exposure machine is too high Solution: (1) Generally, the temperature is controlled at 22 ± 2 ℃ and the humidity is 55% ± 5% RH. (2) The exposure machine with cold light source or cooling device shall be used and the backup film shall be replaced continuously.
Oct. 09, 2022
The purpose of etching is to etch the unprotected non-conductive part of copper on the printed circuit board with patterns made in the previous process to form a circuit. The etching includes inner layer etching and outer layer etching. The inner layer adopts acid etching, and the wet film or dry film is an anti-corrosion agent; The outer layer is alkaline etched, and tin lead is the corrosion inhibitor.
Sep. 29, 2022
Huawei Mate 50 series has been officially put on sale, "sold out in seconds", in the first sale process, there is no doubt that the reproduction of "one machine is hard to find" the grand situation. Tiktok blogger Boge Review has been the first to take apart the Huawei Mate 50 Pro, giving us a peek inside. Similar to other smartphones, starting from the back of the body of the Mate 50 Pro, the back can be opened after heating. When compared with the Mate 40 Pro, the internal layout of the two phones is basically the same, but the camera position is different.
Sep. 21, 2022
核心提示：许多客户认为干膜掩模破孔后，应提高薄膜温度和压力以增强附着力。事实上，这种观点是不正确的。
Sep. 15, 2022
丝网印刷是指以丝网为印版基材，采用感光制版方法，制作出带有图片和文字的丝网印版。丝网印刷由五个要素组成，丝网印版、刮刀、油墨、印刷架和承印物。丝网印刷的基本原理是，丝网的一部分可以透过油墨，而另一部分则不能透过油墨。印刷时，将油墨倒入丝网印版的一端，用刮刀在丝网印版的油墨部分施加一定的压力，同时以恒定的速度向丝网印版的另一端移动。在移动过程中，油墨被刮刀从图形部分的网格挤压到基材上。
2022年9月7日
What is the difference between gold plating and silver plating on PCB? The PCB used in the wide variety of board products in the market is a dazzling variety of colors. The common PCB colors are black, green, blue, yellow, purple, red and brown. In addition, some manufacturers have also developed white, pink and other PCB with different colors.
