1OM-1505-004_w - 第176页
1OM-1505 3. Specications of Printing Stencil Plate Making : Chap.5 5-25 (9) The Range of PCB W idth (Y Direction) in which Printing is Possible T able "T1E7" shows the size of stencil frame and the applicable …
1OM-1505
3. Specications of Printing Stencil Plate Making : Chap.5
5-24
(8.4) How to make a stencil recognition mark
Method:
•
Engrave the stencil recognition mark by half-etching and bury epoxy
resin adhesive mixed with carbon powder into the grooves.
•
A
fter c
uring the adhesive, nish the surface of the stencil recognition
mark and the upper surface of the mask such that both surfaces
become flush. ( against the surface)
Note
A punched hole can be used as a stencil recognition mark if there
is no solder paste around the hole.
Example:
t / 2
Stencil Recongnition Mark
Stainless Metal Mask
1.0 to 2.0
0.35
t = 0.15 to 0.2
Unit : mm
F1E8
Reference Material:
•
Epoxy Resin/Sumitomo 3M/Base 1838B, Hardening Agent 18
38A
•
Carbon Powder/Nishimura Kokuen/Earthy Graphite, Particle Size 1.5
µm
0
-0.05
1103-002
1OM-1505
3. Specications of Printing Stencil Plate Making : Chap.5
5-25
(9) The Range of PCB Width (Y Direction) in which Printing is Possible
Table "T1E7" shows the size of stencil frame and the applicable PCB on
which printing is possible according to the difference in the stencil plate
making reference.
For the PCB width (Y direction), the stopper pin can be positioned at
the rear, center or front according to the stencil frame size, plate making
reference and transfer reference.
Stencil Size Pin
Position
Max. Printable PCB Size
Plate Making
Reference
Paste Release Action
Restricted on the Rear Side
X
direction
Y
direction
X direction Y direction
750 750 A 510 460 Rear Not Available
Center 430 or more for PCB
Direction Y Not Available
Front 445 or more for PCB
Direction Y Not Available
736 736 B 490 381
Rear/Center/Front
None
720 720 C 470 381
Rear/Center/Front
None
750 650 E 510 381
Rear/Center/Front
None
650 750 D 330 381
Rear/Center/Front
None
650 550 E 330 250
Rear/Center/Front
None
Unit : mm
T1E7
A
B
C
D
E
F1E9
1103-002
1OM-1505
4. Fiducial Marks : Chap.5
5-26
4. Fiducial Marks
(1) Type and Size
T1E8-1
1103-003