Method for solving skip plating of fixed position of PCB (Printed Circuit Board) caused by battery effect
A technology of PCB board and fixed position is applied in the field of solving PCB board jumping plating caused by battery effect, which can solve problems such as PAD jumping plating, and achieve the effect of increasing the heating speed.
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Embodiment 1
[0050] A method for a circuit board shown in this embodiment, which can solve the problem of jump plating at a fixed position of a PCB board caused by a battery effect, includes the following processing steps in sequence:
[0051] (1) Cutting: cut out the core board according to the size of the puzzle board 520mm×620mm, the thickness of the core board is 0.5mm, and the thickness of the copper layer on both surfaces of the core board is 0.5oz.
[0052] (2) Production of inner layer circuit (negative film process): The inner layer pattern is transferred, and the photosensitive film is coated with a vertical coater, and the film thickness of the photosensitive film is controlled to 8 μm. Grid exposure ruler) to complete the exposure of the inner layer circuit, and the inner layer circuit pattern is formed after development; inner layer etching, the inner layer circuit is etched from the exposed and developed core board, and the inner layer line width is measured as 3mil; the inner...
Embodiment 2
[0074] The method for a circuit board shown in this embodiment is basically the same as the method described in Embodiment 1, except that between steps (7) and (8), plug holes are also included in the metallized holes, The steps to form a fully plugged hole or a half plugged hole are as follows:
[0075] (71) Plug hole: perform resin ink plug hole treatment on at least one metallized hole of the production plate to form a plug hole;
[0076] (72) Baking: the resin ink is cured by baking, wherein the baking includes a low temperature section with a temperature ≤ 100 °C and a high temperature section with a temperature greater than 100 °C, and the heating rate in the low temperature section is controlled at 0.4-0.5 °C / min , and the heating rate in the high temperature section is controlled at 0.8-1.0 °C / min; in this step, the method of sub-baking is adopted, and the conditions of sub-baking are as follows: the first stage: temperature 50 ° C, time 30 min; Second stage: temperat...
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