After successfully reverse engineering of a four-layer board, I wondered: can I do the same with a six-layer board?

Here is the result.

The board dimensions are approximately 17 mm x 17 mm. There is one BGA chip. Most of the components are 0402 and 0201. First, let me show you the Layer Stack.

TOP layer with components and solder mask

TOP layer without components and with solder mask

TOP layer without components and wihout solder mask.

TOP layer scanned from the Inner Layer 1 side.

Top layer without componets redrawn by me on Inkscape. 

Top layer with componets redrawn by me on Inkscape. 

Inner layer 1

Inner layer 1 scanned from the TOP side.

The TOP  layer ,  Inner Layer 2 , Inner Layer 3 , Inner Layer 4 and  BOT layer were removed by sanding.

Inner layer 1 scanned from the Inner Layer 2 side.

The glass textolite between the Inner layer 1 and inner layer 2 has not yet been completely removed.

Inner Layer 2 , Inner Layer 3 , Inner Layer 4 and  BOT layer were removed by sanding.

The TOP  layer and  Inner Layer 1 were not removed by sanding.

Inner layer 1 redrawn by me on Inkscape.

Inner layer 2

            Inner layer 2.

The glass textolite between the Inner layer 2 and inner layer 3 has not yet been completely removed.

Inner layer 2 redrawn by me on Inkscape.

Inner layer 3.

Inner layer 3.

The glass textolite between the Inner layer 3 and inner layer 4 has not yet been completely removed.

The TOP layer , Inner Layer 1, and Inner Layer 2  were removed by sanding.

 Inner Layer 4 and  BOT layer were removed by sanding.

Inner layer 3 redrawn by me on Inkscape.

Inner layer 4

Inner layer 4  scanned from the BOT side.

The TOP layer, Inner Layer 1,  Inner Layer 2 and Inner Layer 3  were removed by sanding.

 BOT layer were removed by sanding.

Inner layer 4 redrawn by me on Inkscape.

BOT layer with solder mask.

BOT layer. The Solder mask was removed.

BOT layer scanned from the Inner Layer 4 side.

The TOP layer , Inner Layer 1 , Inner Layer 2 , Inner Layer 3 and Inner Layer 4 were removed.

BOT redrawn by me on Inkscape.

In the attached file you can find all layers  in one SVG file.