Flexible Printed Circuit FPC on PET with
White Solder Mask
(Flexible
printed circuits are custom-made products, the picture and parameters shown are
just for reference)
General Information:
The FPC is coating with
white solder mask and immersion gold on pads. The pads are bulged for the
printer applications.
FPC Specifications:
|
PCB SIZE
|
172 x
145mm=1PCS
|
|
Base Material:
|
PET
|
|
Number of Layers
|
Double sided PCB
|
|
SMT
|
n/a
|
|
Through Hole Components
|
no
|
|
LAYER STACKUP
|
Copper
------- 35um(1oz)
|
|
Adhesive
|
|
PET
|
|
Adhesive
|
|
Copper ------- 35um(1oz)
|
|
Minimum Trace and Space:
|
4mil/8mil
|
|
Minimum / Maximum Holes:
|
1.2mm/
3.5mm
|
|
Final foil external:
|
1oz
|
|
Final foil internal:
|
0oz
|
|
Final height of PCB:
|
0.25mm
±0.05
|
|
Surface Finish
|
Immersion
gold
|
|
Solder Mask Apply To:
|
TOP, Bottom
|
|
Solder Mask Color:
|
White Coverlay
|
|
CONTOUR/CUTTING
|
Punching
|
|
Stiffener:
|
PET
on back of gold finger area
|
|
Side of Component Legend
|
NO
|
|
Colour of Component Legend
|
NO
|
|
VIA
|
Plated
Through Hole(PTH)
|
|
FLAMIBILITY RATING
|
UL
94-V0 Approval MIN.
|
|
TEST
|
100%
Electrical Test prior shipment
|
|
TYPE OF ARTWORK TO BE SUPPLIED
|
email
file, Gerber RS-274-X, PCBDOC etc
|
|
SERVICE AREA
|
Worldwide,
Globally.
|
Features and Benefits:
Excellent flexibility;
Reduced PCB volume;
Reduced weight;
Increased reliability
Consistency of assembly;
More than 18+ years of PCB experience;
Customer complaint rate: <1%
Prototype capability;
Volume Production capability
Typical Applications:
Capacitive
touch screen / panel, Industrial control temperature controller soft board,
consumer card reader soft board
Covercoat
/ Solder Mask:
Solder
mask in flexible PCB is different from rigid board, it is usually a polyimide
film coated on one side with a semi-cured and non-tacky adhesive, we call it
covercoat in flexible circuit. It is laminated to the flexible circuit under
heat and pressure, so that the copper pattern is fully encapsulated except for
the solder pads that are exposed through access holes in the covercoat.
The
covercoat production sheet should be cut slightly smaller than the flexible
circuit production sheet to avoid premature edge sealing, which could trap air
bubbles in the package.
The
production sheet for the covercoat is provided with tooling holes in close
register with the tooling holes in the production sheet for the flexible
circuit. The access holes are usually drilled, but in the case of high-volume
production, punching is more cost-effective.
In
principle, drilling of the covercoat is accomplished in the same way as when
drilling rigid boards, i.e., a number of covercoat sheets are stacked, either
5-up or 10-up. The drilling parameters, however, are somewhat different,
because of the polyimide material and the absence of copper foil, which otherwise
could have removed some of the heat from the holes being drilled.
When
drilling/punching large covercoat production sheets, it is necessary to
compensate for the dimensional changes of the flexible circuit production
sheet, which can amount to as much as 0.2%.
FPC Capabilities 2022:
|
No.
|
Specifications
|
Capabilities
|
|
1
|
Board
Type
|
Single
layer, Doulbe layer, Multilayer, Rigid-Flex
|
|
2
|
Base
Material
|
PI,
PET
|
|
3
|
Copper
Weight
|
0.5oz,
1oz, 2oz
|
|
4
|
LED
Maximum Size
|
250
x 5000mm
|
|
5
|
General
Maximum Size
|
250
x 2000mm
|
|
6
|
Board
Thickness
|
0.03mm-3.0mm
|
|
7
|
Thickness
Tolerance
|
±0.03mm
|
|
8
|
Mininum
Drill Hole
|
0.05mm
|
|
9
|
Maximum
Drill Hole
|
6.5mm
|
|
10
|
Tolerance
of Drill Hole
|
±0.025mm
|
|
11
|
Thickness
of Hole Wall
|
≧8 um
|
|
12
|
Minimum
Track/Gap of Single Layer Board
|
0.025/0.03mm
|
|
13
|
Minimum
Track/Gap of Double Layer and Multilayer Board
|
0.03/0.040mm
|
|
14
|
Etching
Tolerance
|
±0.02mm
|
|
15
|
Minimum
Width of Silk Legend
|
≧0.125mm
|
|
16
|
Minimum
Heigh of Silk Legend
|
≧0.75mm
|
|
17
|
Distance
from Legend to Pad
|
≧0.15mm
|
|
18
|
Distance
from Opening Solder Mask of Drill Coverlay to Track
|
≧0.03mm
|
|
19
|
Distance
from Opening Solder Mask of Punching Coverlay to Track
|
≧0.03mm
|
|
20
|
Thickness
of Immersion Nickel
|
100-300u"
|
|
21
|
Thickness
of Immersion Gold
|
1-3u"
|
|
22
|
Thicnkess
of Immersion Tin
|
150-400u"
|
|
23
|
Minimum
Electrical Testing Pad
|
0.2mm
|
|
24
|
Minimum
Tolerance of Outline(Normal Steel Mould Punch)
|
±0.1mm
|
|
25
|
Minimum
Tolerance of Outline (Precision Steel Mould Punch)
|
±0.05mm
|
|
26
|
Mininum
Radius of Bevel Angle (Outline)
|
0.2mm
|
|
27
|
Stiffner
Material
|
PI,
FR-4, 3M Adhesive, PET, Steel Sheet
|
|
28
|
RoHs
|
Yes
|
|
29
|
Solder
Mask Colour
|
Yellow,
White, Black, Green
|
More
Displays of White Flex:
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