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Phenolic Resin Back-up Laminate SD-BU26:
Commonly known as Back-up board, Entry board, PCB drilling board
(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(%).
Commonly known as Back-up board, Entry board, PCB drilling board
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-BU26 | For BGA 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-BU26 | +1.5/-0.1 | ±0.05 | (S)942×1245 (M)1042×1245 (L)1092×1245 |
| Typical Properties | Test Method | Condition(1) | Unit | Value | |
| SD-BU26 | |||||
| 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. (Case Number: ET88D0181)
(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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