2results about How to "Precise shape control" patented technology

This utility model belongs to the field of medical device technology and discloses a tunneling knife for cardiothoracic surgery. It includes a knife body and blade tips and a handle respectively disposed at both ends of the knife body, with the blade tips being conical or bullet-shaped. This utility model has a simple structure, is easy to operate, can precisely control the size and shape of the incision, and results in a small surgical wound, making it highly practical. This utility model also includes a tunnel tube sleeved on the knife body. The tunnel tube sleeved on the knife body allows the tunnel tube to be inserted into the puncture tunnel during the puncture process. After the puncture is completed, there is no need to insert the tunnel tube separately after the puncture, which greatly improves surgical efficiency.

The application discloses a manufacturing process for improving the solder mask bridge falling problem of a high-layer circuit board based on an AI server, relates to the field of PCB manufacturing technologies, and comprises a pretreatment process, a silk-screen printing process, a pre-baking process, an exposure process, a developing process and a high-temperature curing process. The pretreatment process adopts volcano ash plate grinding and super-rough cleaning. The silk-screen printing process adopts secondary printing of oil, and the first solder mask bridge position is blocked from oil. The exposure process reduces the gap between the solder mask bridge and the design PAD and etching PAD. The developing process maintains the pH value of developing liquid at a constant value by calculating the ink usage of a single PCB and adopting the drag tank method or the production green oil plate method, so that the problems of the prior art, such as the easy falling of the solder mask bridge and the high defect rate, are solved.