PCB design company in Shenzhen, Shenzhen PCB design - to recommend Tao Rong, Shenzhen Science and Technology in the design, from the perspective of the PCB assembly point of view, to consider the following parameters: diameter of 1) hole to the maximum material condition (MMC) and minimum case material condition (LMC) to decide. A non-porous support such components should be selected diameter, i.e. subtracted from the MMC MMC pin hole, and the resulting difference in 0.15 -0. 5mm between. And for the ribbon pins, nominal diagonal and unsupported difference in inner diameter pin hole will not exceed 0.5mm, and less than 0.15mm. 2) a reasonable place smaller components so that it will not be covered larger components. 3) The thickness of the solder should be less than 0.05mm. 4) screen printing logo can not intersect any pads. Upper half 5) and the lower half of the board should be the same, in order to achieve a symmetrical structure. Because asymmetric circuit board may become bent. Name: Mr. Liang Tel: 0755-29809393 Mobile: 18576632614 Address: Longhua District, East Central all the way Tenway Building D-608 E-mail: market@cntorom.com Company Website: http://www.cntorom.com