Method for manufacturing PCB (Printed Circuit Board) with stepped grooves
A technology of PCB board and production method, which is applied in printed circuit manufacturing, electrical components, printed circuits and other directions, can solve the problems of high cost and high requirements for operating skills of silicone sheets, and achieve the effects of low cost, simple operation and high operation efficiency.
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[0021] Such as figure 1 versus figure 2 As shown, the manufacturing method of the PCB board with stepped grooves of the present invention includes the following steps;
[0022] Step 1: Provide the prepreg 11, the outer core board 12 and the inner core board 13 with the inner pattern already made, and the outer core board 12, the prepreg 11 and the inner core board 13 are at the corresponding positions of the step groove 16 to be formed Open slots 111, 121, 131 respectively;
[0023] Step 2: Lay the outer core board 12, the prepreg 11 and the inner core board 13 together in a predetermined stacking order;
[0024] Step 3: Fill the through grooves 111, 121, 131 of the outer core board 12, the prepreg 11, and the inner core board 13 with polytetrafluoroethylene (PTFE) gaskets 14, which can be processed by a milling machine to make;
[0025] Step 4: Place PTFE buffer plates 15 on the outer sides of the outer core plates 12 on both sides of the laminate, and perform melt lamination unde...
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