PCB design method of reducing multi-layer board to two-layer board
Some PCB designs have powerpcb files that cannot be laminated in normal mode, and I'll show you a way to go from multi-laminated to two-laminated:
In the first step, in the board Layer definition under Setup, the Electrical Layer Type of GND and VCC is No Plane, and it is OK to exit.
Step 2: remove all blind embedded holes in Pad Stacks under Setup, and exit OK.
Step 3: close the top and bottom layer in Display Colors under Setup, leaving only the middle two layers.
Step 4: enter ECO mode.
Step 5, right mouse button, Select left /Pins.
Step 6, right mouse button, Select All;
Step 7. Remove all Drill pairs under the Drill pairs under setup;
Step 8: under the menu bar File, SELECT Export and save. In the ASCII OUTPUT dialog box, click SELECT All instead of PCB parameters.
Finally, PCB design powerpcb to build a new file, import just saved that file.
In addition, the 3.4 layer in Reassign Electrical Layers in the board definition under Setup shall be displayed as NO before it can be turned into a two-layer board. If it is shown as YES, it indicates that there is still network not removed.