PCB board quality tha lo chhan 4 a awm a .

1. Circuit board for some thin substrate (a tlangpuiin 0.8mm aia tlem zawk), chu chu substrate-a rigidity tha lo tak avang te, substrate siam dan leh processing process-ah te, special treatment hnua protective layer chu a tha taka paih chhuah theih a ni lo mai thei a, chu chuan plate chunglama copper foil oxidation venna tur venna atan a ti tlem hle a, mahse, a process-naah chuan a process-naah chuan a awm a, mahse, circuit-ah chuan circuit-ah chuan a awm a, chu chu a awlsam hle a ni. Control tur chuan, plate-a adhesion leh foaming \\ha lo buaina chu a pumpelh thei a, chubakah copper foil leh chemical copper substrate pawh a awm thei bawk; Thin inner layer chu a dum a, a dum a, a dum a, a sen thei a, a rawng a chhe a, a rawng a inang lo a, a then chu a dum a, a dum a, a dum a, a dum a, a dum a, a dum a ni.
2. Substrate surface (drilling, laminating, milling, etc.) process mechanical processing-ah chuan oil stain emaw, surface treatment \\ha lo avanga leivut bawlhhlawh tui dang emaw a awm vang a ni.
3. Bad Copper Sinking: Copper sinking hmaa millstone pressure a lian lutuk a, chu chuan hole a deformation a thlen a, hole copper foil fillet chu brush off a ni a, substrate atang pawhin hole a chhuak a, chu chuan sinking hole foaming phenomenon a thlen ang Copper plating, spraying tin welding, brush plate hian substrate leakage a thlen dawn lo a nih pawhin, copper hian hole copper roughness a tipung ang a, chu chuan copper foil awmna hmun chu micro-etching easy excessive roughness process-ah a tipung ang a, chubakah quality risks te pawh ngaihven a ngai ang, brushing process control tichak turin ngaihven tur a ni a, wear trace test parameters te chu a dik thei ang bera siam thei tur a ni thei bawk.
4. Washing problem: Copper plating vang hian chemical hmanga enkawlna tam tak a kal a ngai a, chuvangin acid, alkali, organic leh drug solvent chi dang chi hrang hrang a awm a, board chunglam chu tui hmanga tihfai theih a ni lo a, a bik takin copper pil chu degreasing agent nena siamrem a nih theih nan, cross contamination a thlen mai ni lovin, control surface of treatment a thlen tur a ni a, chu chuan attention a pe tur a ni a, a rilru a hah lutuk tur a ni. A bik takin washing water flow, tui quality leh washing time bakah panel dripping time control te, a bik takin thlasik lai chuan temperature hniam, washing effect nasa taka tihtlem a ni ang a, washing control lam hi ngaihven zawk tur a ni.