Heat resistant solder resist ink(For RPC)
TAINEX HRS-1-7W White
Overwhelming heat-resistance of silicone resin
- Feature High heat resistance：The high heat resistance property is achieved with a silicone resin. Almost no reflectance deterioration was detected under the condition of 150℃ for 1000 hours.
- Feature Superb UV resistance：The HRS-1-7W is resistant to ultraviolet radiation and almost no deterioration has been noted even when exposed to UV-C irradiation.
- Feature Countermeasure against low-molecular siloxane：Even though HRS-1-7W is consisted of silicone resin,there is no detection of low-molecular siloxane, which may cause electrical contact failure.※1
Feature High heat resistance
The reflectance deterioration rate after heating the product at 150℃ for 1000 hours was as low as 1%. There was almost no change compared to the initial condition.
| Product Name |
Reflection rate （450nm） |
L | a | b |
|---|---|---|---|---|
| HRS-1-7W | 90.4 | 95.0 | -1.0 | -0.7 |
| HRS-1-7W 150℃×1000Hr | 89.0 | 95.0 | -1.5 | 0.1 |
Feature Superb UV resistance
UV-C Irradiation time - Gloss (on copper)
With resistor inks that are based on organic resins including epoxy resin, their luster is deteriorated by UV-C. With HRS-1-7W, however, it is free from any deterioration in luster.
UV-C Irradiation time - 450mm light reflectance (on copper)
With resistor inks that are based on organic resins including epoxy resin, their reflectance is deteriorated by UV-C. With HRS-1-7W, however, it is free from any deterioration in reflectance.
| HRS-1-7W | Voltage resistance |
|---|---|
| Initial | 500V OK |
| After UV-C irradiation for 1000 hours | 500V OK |
HRS-1-7W is free from any insulation breakdown at 500 V even after it has been exposed to UV-C irradiation for 1000 hours.
Feature Countermeasure against low-molecular siloxane※1
Amount of low molecular siloxane in the ink (D4-D10)
|
Types of cyclic siloxiane |
Concentration ［ppm］ |
|---|---|
| D4 | N.D. |
| D5 | N.D. |
| D6 | N.D. |
| D7 | N.D. |
| D8 | N.D. |
| D9 | N.D. |
| D10 | N.D. |
| Σ Dn（n=4～10） | N.D. |
HRS-1-7W is a solder resistor ink consisting of a silicone resin which features high light reflectivity due to its white color and superb heat resistance.
Measurement was performed at
Kita-Kanto Analysis Center,
TOSHIBA ENVIRONMENTAL
SOLUTIONS CORPORATION.
Measurement method: measurement tool:
gas chromatograph (GC/FID)
■Coating film performance
| Item | Test method | HRS-1-7W |
|---|---|---|
| Hardness | JIS K5600-5-4 | 3H |
| Adhesion | JIS K5600-5-6 | Category 0 |
| Solvent resistance | Isopropyl alcohol, 5Min immersion at room temp. | OK |
| Acid resistance | 10% sulfuric ,30 Min immersion at room temp. | OK |
| Alkaline resistance | 5% sodium hydrate, 5 Min immersion at room temp. | OK |
| Solder resistance | JIS C6481 260 deg.C for 20 Sec. | OK |
| Gold plating resistance |
Electroless nickel gold plating process （Ni：3μm、Au：0.05μm |
OK |
| PCT | 121 deg. C for 9 Hr | OK |
| Combustibleness | UL standard | 94V-0 eq. |
■Electric characteristics
| Item | Test method | HRS-1-7W |
|---|---|---|
| Insulation resistance | Initial value | 1.8×1012 |
| 24V load, 85 deg. C, RH85%, 1000Hr | 9.8×1012 | |
| Surface resistanse | JIS C6481-5-10 | 1.8×1011Ω |
| Volume resistivity | JIS C6481-5-9 | 1.0×1013Ω･cm |
| Voltage resistance | 500V×1Min energization | OK |
*The results above show reference values, not standard values.
