Snyder International Ltd. Shenzhen Branch Newell Electronic Technology Co., Ltd. The company is a custom 2-40 layer PCB board professional providers. PCB printed circuit board historical Austrian inventor Paul Eisler (PaulEisler), he in 1936 in a radio device uses a printed circuit board. In 1943, a large number of Americans use the technology in the military radio. In 1948, the United States officially recognized the invention is used for commercial purposes. Since the mid-1950s from the circuit board, printed circuit board technology began to be widely used. Snyder International Ltd. Shenzhen Branch Newell Electronic Technology Co., Ltd. The company is a custom 2-40 layer PCB board professional providers, the main provider of the plate there HDI boards, finger board, Bluetooth module board, half plate, through the plate, rigid-flex board, plywood and other series of plates. shape (eg frame, slot circuit board manufacturers where, V-CUT) must be placed KEEPOUT layer or a mechanical layer printed circuit board what characteristics, not on other layers, such as silkscreen, line layers. All required mechanical forming grooves or holes in one place Try to avoid leakage of slots or holes. If the mechanical layer and two layers KEEPOUT inconsistent shape, do special note, another form to give effective shape, Any place within the groove, and the groove at the intersection of the outer contour of the plate line to be deleted, to avoid leakage gong groove, Design in the slot and hole mechanical layer and KEEPOUT layer is generally produced by non-copper hole (when do you want to dig copper film), to be treated as if the hole in metal, special notes. Ziyang circuit boards, circuit board design, Newell record (certified merchants) are provided by Shenzhen Electronic Technology Co., Ltd. Newell. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) is specialized in "pcb board" of the enterprise, the company of "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Huang Shengxing.