Allegro 17.4 Production of Pads and Packages#
Production of Pads#
The stamp hole is a semicircle with a radius of 0.5mm. Therefore, we draw a rectangular pad as an example of a vertical line. The left side is 0.7mm and the right side is 0.7mm, which is a total of 1.4mm. Therefore, we create a surface mount pad with a width of 1.4 and a height of 1.0 (for side pads, swap the width and height for bottom pads).
Open the pad creation software Padstack Editor
Set library path
Set units and grid
Set text parameters
Package composition elements
Place pads
Add package silkscreen
Cut silkscreen lines
Add REF
Draw Place Bound region
Add Route Keepout region
Change units
BEGIN LAYER Top Layer
DEFAULT INTERNAL Middle Layer
END LAYER Bottom Layer
SOLDERMASK_TOP Solder Mask Layer generally larger by 0.1
SOLDERMASK_BOTTOM Solder Mask Layer generally larger by 0.1
PASTEMASK_TOP Stencil Layer
PASTEMASK_BOTTOM Stencil Layer
THS1R84D1R02 interpretation: TH through-hole, S square (C circular), outer diameter 1.84mm, hole diameter inside D is 1.02mm
For through-hole pads, we generally increase the physical hole diameter by 0.2. The value given by the PCB layout generally does not need to be increased.
Production of Packages#
Change units#
Change font#
0.508 0.635 0.127 0.127 0.127
Change grid#
Setup->Grids Change grid size to 0.127mm (5 mil)
Add pads#
Enter coordinates command in the lower left corner
X space x space y (x, y are coordinates, e.g. X -8.89 0)
Draw silkscreen#
Click Lin, select top silkscreen, line width 0.15mm
Geometry package for silkscreen -> Top Silkscreen_Top
ASSEMBLY_TOP Top Assembly Layer
Set coordinates, ix for x coordinate offset (negative for left, positive for right), iy for y coordinate offset (positive for up, negative for down)
Add reference designators#
Enter character REF, copy it to the silkscreen layer (if unable to copy, enter two REF characters, change one to silkscreen layer, and the other to assembly layer, overlap the two characters)
Add placebound region#
Select Place Bound
Just select the silkscreen part
Pin colors can also be changed#
Select Pin-> Top, left-click to modify color
