Via Plugging

Overview of the variations

Wording according IPC 4761
description and options
Image Usual wording
Plugged Via

im Portfolio von WE CBT
Type III-a
sealing with a
non-conductive
material on one
side, which partially
enters the via

Plugged Via Type III-a
Plugged Via /
Via Plugging

on one side

Via fill print
Via closing print
Via closing
Plugged Via Type III-b
sealing with a
non-conductive
material on both sides, which
partially enters the via

Plugged Via Type III-b
Plugged Via /
Via Plugging

on both sides
Plugged & Covered Via Type IV-a
sealing with a
non-conductive
material on one
side, which partially
enters the via
and additional
covered up
with soldermask



Type IV-b
sealing with a
non-conductive
material on both
sides, which partially
enters the via
and additional
covered up
with soldermask

Plugged & Covered Via Type IV-a







Plugged & Covered Via Type IV-b

Plugged & Covered Via /
Via Plugging & Covering

on one side

Via fill print before soldermask
Via closing print before soldermask
Via closing before soldermask


Plugged & Covered Via /
Via Plugging & Covering

on both sides


im Portfolio von WE CBT = recommended by WE

Initial situation A „opened” vias:

  • Possible solder run-off into vias (solder bridges)
  • In-circuit test at assembly

Solution:

The most cost effective way to close the vias is by means of a plugging process. Relatively large space requirements (clearance to neighbouring solder lands) and additional coating thickness above the soldermask must be taken into consideration.

Plugged Via

Type III-a

sealing with a
non-conductive material
on one side, which partially
enters the via

Plugged Via

Type III-b

sealing with a
non-conductive
material on both sides, which
partially enters the via

Plugged &
Covered Via

Type IV-a

sealing with a
non-conductive
material on one side,
which partially enters the
via and additional covered
up with soldermask

Plugged &
Covered Via

Type IV-b

sealing with a
non-conductive
material on both sides,
which partially enters the
via and additional covered up
with soldermask