Product lineup : 
TOPFINE R1000 : Composite Engineering Plastic based on PPS and special inorganic particles 
TOPFINE R8220 : Composite Engineering Plastic based on PEI and special inorganic particles

Features : 
- Low water absorption rate and low linear expansion coefficient result in high dimensional stability. 
- Highly suitable for precision microhole drilling with minumal flash which doesn't occur probe pin errors, instead of Aromatic polyester.
- Outsranding stiffness is suitable for thin processed products. Due to this stiffness and good workability, conventional ceramics, bakelite and glass-reinforced expoxy which are stiff and nortoriously diffcult to machine are replaced by TOPFINE.
- Thermal resistance sufficient for testing tools.


Use application : 
Inspection device for semiconductor.


Precautions for machining : 
- Because TOPFINE has high stiffness, drill selection, blade sustainability and other factors are critical.
- Due to its composition, the material has less elongation and can get chipped easily. This should be taken into consideration during the parts design process.
- Since the glass transition temperature is lower than the aromatic polyester, usage under high loads and high temperatures must be performed after rigorous tests.