Toray Develops Antistatic ABS Resin for Semiconductor Processes

Toray Industries, Inc., has developed a highly antistatic version of Toyolacparel acrylonitrile butadiene styrene (ABS) resin. The surface resistivity is 10⁹Ω/sq (one billion ohms per square), one-fifth that of the company’s conventional counterpart.

Toyolacparel provides durable antistatic performance by forming a continuous-layer 3D network of antistatic polymer throughout the ABS resin. The high surface resistivity of the new compound reflects an improved molecular design and micro-scale control of the continuous-layer structure with proprietary polymer alloy technology. This further expands the potential of the high-antistatic Toyolacparel lineup, supporting a wider range of applications and meeting more stringent antistatic requirements.

Used in trays, cases, and other handling equipment for semiconductor and electronic device manufacturing, the new grade can suppress the generation of minute levels of static electricity, thereby lowering the risk of product damage or defects from dust and other contaminants. Toray will begin providing samples to customers from next fiscal year and will continue research and development.

Antistic properties arise within the polymer itself. Therefore, performance does not deteriorate if wiped with a cloth or washed with water. Moreover, if the surface of the molded product is scratched, the antistatic effect is not lost. Image: Toray

Stopping the static

The semiconductor market has grown rapidly in recent years. As devices become smaller and more highly integrated, even small amounts of static electricity can cause product damage and reduce yields. This is driving demand for higher antistatic performance in handling materials for manufacturing processes. There is also a rising need for transparent cases and color-coded parts, making design and appearance important. While antistatic ABS resins containing conductive fillers are widely used, their antistatic durability, molded-part appearance, and color flexibility are limited if the antistatic additive is colored black as is the case with carbon black and carbon fiber. This has increased the need for a new material that can simultaneously address these issues.