| |
Sensitivity At Various Exposure Energies
Unit: Step
|
Grade |
|
GF-1540 |
Conventional |
|
Development |
|
28sec (BP 14sec) |
26sec(BP 13sec) |
|
Exposure Energy (mj/cm2) |
20 |
4.5 |
4 |
|
30 |
5.57 |
5.57 |
|
40 |
7 |
7 |
|
50 |
7.5 |
7.25 |
|
60 |
8 |
7.75 |
|
70 |
8.5 |
8.5 |
|
80 |
9 |
8.75 |
|
90 |
9.5 |
9.25 |
|
100 |
10 |
10 | |
Data for Reference
Exposure was given by placing Stouffer 21 step sensitivity tablet directly in contact with DFR, and counted the steps still remaining after development.
Summary
LONGLITE GF-1540 is a negative type dry film photo resist. It is designed to satisfy different applications of PCB manufacturing. GF-1540 is suitable for etching, tenting copper/tin plating and copper/tin plating processes.
Features
 |
Excellent adhesion and conformation capability. |
|
Excellent resolution characteristics. |
|
Wide exposure latitude. |
|
Good chemical resistance and wide margin in developmnent. |
|
Strong and flexible film characteristics, high tenting reliability. |
|
Low sludge in development bath. |
|
Less contamination to plating bath. |
|
High image contrast. | |
Specification
| Thickness |
40 um |
| Standad width int |
0.125 inch |
| Length |
500 ft/roll | |
Storage
Store horizontally in a cool dry warehouse with temperature 5-200C and RH 50 to 10%
Saftey Handling
|
Safe to use under UV-cut yellow fluorescent lamps. When not using, seal by black sheet such as its original black plastic packing sheet, and lay down dry film rolls horizontally for storage. |
|
Lamination will cause vapour, use in room with adequate ventilation. |
|
Avoid contacting the resist layer of dry film with skin directly, which may cause irritation. Wash with soap and water throughly after handling. If persistent irritation occurs, consult a physician. | | |
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