IT3/IT5
Connector System
PWB
A
SSEMBLY
N
OTES
Document Number:
ETAD-F0458
Revision 3.10
Page
25
of
73
5.2 Stencil Design
The suggested PWB pad design is non-solder mask defined 0.6mm diameter circles, patterned
as shown in section 3.1. A
0.54mm circular stencil aperture is recommended
to correspond
to the 0.6mm pad. The diameter of the aperture is intentionally reduced to compensate for
typical misalignment between the stencil’s apertures and the PWB’s pads, which can affect
print quality. 0.54mm square apertures may also be used; if so, their corners should have
radius of at least 0.1mm.
5.3 Effect of Alignment
Stencil
thicknesses of 125 to 150 microns are best
; thicknesses of 100-124 microns and 151-
175 microns are acceptable. Thicknesses less than 100 microns or greater than 175 microns
are not recommended.
ALIGNMENT
MISALIGNMENT
GOOD PRINT
ACCEPTABLE PRINT
Circular apertures more robust than
square in case of misalignment
PWB
Stencil
0.6mm
Round
Aperture
Square
Aperture
Solder
Mask
Stencil
Thickness
125-150
micron
PWB
STENCIL
+
0.6mm Round Pads
0.54mm Round Apertures
Stencil Thickness:
125-150 micron
Nov.1.2022 Copyright 2022 HIROSE ELECTRIC CO., LTD. All Rights Reserved.
