JIE XING ELECTRONIC(HONG KONG )LIMITED Is a UL & ISO9001: 2000 certified manufactory of Printed Circuit Boards in Shenzhen, China.we are focused on high-precision proto type with quick turn and small and medium volume manufacturing 1.We can produce 30 layer boards, we has produced HDI 2 step technology 2.we can produce thick boards thick copper, high frequency boards. 3. for quick turn board&＃039;s manufacturer , we can finished double sided boards in 24hours, 4-8layers boards have fast turn cycle from 2-5days. 4. We can do surface as (lead free) HASL, Immersion Gold, Immersion Tin / silver, Flash Gold, OSP, Hard Gold, Flashed Goldï¼?ENIG+Gold Fingerï¼?Flash Gold+Gold Fingerï¼?Immersion Silver+Gold Fingerï¼?Immersion Tin+Gold Finger 5. max board thickness is 7.0mm we can do .mix copper thickness 7OZ, min mechnical drilling 0.15mm, aspect ratio 13:1, min line width/spacing:3.5/4mil, Max production size is 600*800mm.