In the dry etching process of semiconductor manufacturing, silicone rubber seals must withstand long-term bombardment by high-energy plasma. Ordinary materials suffer from surface pulverization and mass loss due to molecular chain breakage and oxidative degradation, leading to particle contamination and vacuum leakage. Phenyl gum, with its unique "rigid molecular framework" and "plasma shielding mechanism," transforms into an "ultra-stable structural framework" for the etching cavity, constructing a three-dimensional defense against high-energy particle erosion at the microscopic level.

The core of phenyl gum's improved etching resistance lies in its "energy dissipation of phenyl groups" and "dense cross-linked network." When high-energy particles in the plasma (such as CF₄⁺ and O₂⁺) collide with the rubber surface, the Si-O bonds in ordinary silicone rubber easily break, generating volatile small molecules. In phenyl raw rubber, the π-electron cloud of the phenyl group effectively absorbs the kinetic energy of high-energy particles, dispersing the energy throughout the benzene ring structure through resonant transfer. This acts like a "miniature shock absorber" for the molecular chain, reducing the probability of Si-O bond breakage by 80%. Simultaneously, the rigid structure of the phenyl group allows for tighter molecular chain packing, reducing free volume and forming a "physical shielding layer" that prevents active particles from penetrating into the material's interior.

Furthermore, the excellent thermal stability of phenyl raw rubber allows it to maintain structural integrity even under the instantaneous high temperatures (>200℃) generated by plasma. Its high cross-linking density network (cross-linking point spacing <2nm) effectively anchors the molecular chains, preventing chain segment detachment due to thermal vibration. After 100 hours of continuous etching with CF₄/O₂ plasma, its mass loss rate is only 1.2%, with no surface cracks or powdering, and a compression set of <3%, far superior to ordinary fluorosilicone rubber.

From the energy dissipation of π-electron clouds at the molecular level to the macroscopic dense corrosion resistance, phenyl raw rubber, with its synergistic mechanism of "rigid shielding and energy dissipation," solves the problem of rapid degradation of silicone rubber in plasma environments. It is not only a key sealing material for the reliable operation of semiconductor equipment, but also an invisible barrier for achieving "zero pollution and long lifespan" in high-end manufacturing.