Inner core plate of sandwich plate and lamination error proof method of sandwich plate
A technology of inner-layer core board and multi-layer board, which is applied in the direction of multi-layer circuit manufacturing, printed circuit components, etc., can solve the problems of reverse inner-layer core board, negative impact on company reputation, compensation, etc., to prevent over-laying, Avoid outflow, improve the effect of quality
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[0025] In order to make the object, technical solution and advantages of the invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] Such as Figures 1 to 5 As shown, an inner core board of a multi-layer board, the inner core board 6 is provided with an inner core board inspection area 1, and the inner layer core board inspection area 1 includes n-2 inner layers arranged in sequence Core board layer marking area 2, the n-1th layer board is provided with a board layer number 3 and a board layer detection copper strip 4 in the n-2th inner layer core board layer marking area 2; n is the number of the multi-layer board The number of layers, and n is greater than 3. figure 1 It is a schematic diagram of the structure of the fourth inner layer core board of the eight-layer board.
[0027] The inner layer core board of the multilayer board of the present invention is provided with an ...
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