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Phenolic Entry Board SD-BU27：俗稱 擋板、尿素板、鑽孔板、PCB鑽孔板
(1) The alphabet in condition indicates the kind of conditioning of specimen.
A: as received without conditioning.
C: conditioned in air under constant temperature and humidity.
D: immersed in water under constant temperature.
E: conditioned in air under constant temperature.
O: immersed in oil under constant temperature.
The first figure is the conditioning time(hours),the second figure is the conditioning temperature(℃) and the third figure is the conditioning relative humidity(%).
The main application for phenolic resin back-up boards is as the protective entry or back-up board while drilling or routing of flexible and/or rigid printed circuit boards (PCB).
| Designations | Characteristics & Applications | Fabricating Suitability | Minimum Diameter for Drilling (mm) |
| SD-BU27 | For FPCB drilling entry or back-up use, low percentage of warp and twist | No smear or burr occurrence while drilling | ≧0.15φ |
| Designations | Standard Thickness (mm) | Thickness Tolerance (mm) | Standard Dimensions (mm) |
| SD-BU27 | 0.4 0.5 0.8 1.0 | ±0.05 ±0.05 +0.05/-0.1 ±0.1 | (S)942×1245 (M)1042×1245 (L)1092×1245 |
| Typical Properties | Test Method | Condition(1) | Unit | Value | |
| SD-BU27 | |||||
| Resin | - | - | - | Phenolic Resin | |
| Composition | - | - | - | Kraft Paper | |
| Standard Colour | - | - | - | Brown |
|
| Specific Gravity | JIS-K6911 | - | - | 1.38~1.44 | |
| Heat Resistance | 120 Minutes at 120 ℃ | A | - | No Change | |
| Flexural Strength (Crosswise) | MD | JIS-K6911 | A | Kgf/mm2 | ≧13.0 |
| CD | ≧11.0 | ||||
| Water Absorption | JIS-K6911 | E-24/50+D-24/23 | g/200cm2 | ≦2.0 | |
| Percentage of Warp and Twist | JIS-K6911 | A | % | ≦0.9 | |
| Hardness, Shore D | JIS-K7215 | A | ° | 90±2 | |
| Storage | - | - | ℃ | 5~40 | |
| - | RH | % | 50~80 | ||
※The heavy metal content of this product tested by the Environmental Affairs Department is in accordance with the National Standard.
(1) The alphabet in condition indicates the kind of conditioning of specimen.
A: as received without conditioning.
C: conditioned in air under constant temperature and humidity.
D: immersed in water under constant temperature.
E: conditioned in air under constant temperature.
O: immersed in oil under constant temperature.
The first figure is the conditioning time(hours),the second figure is the conditioning temperature(℃) and the third figure is the conditioning relative humidity(%).
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