Dilution is performed as follows:依下列程序進行稀釋: 1. placing of defined amount of resist,置入需要的阻劑數量。 2. addition of defined amount of thinner,加入需要的稀釋劑數量。 3. homogenization by stirring (both liquids should be mixed quickly)快速的將兩種液體攪拌均勻。 4. fine filtration (0.2 μm).過濾 (規格: 0.2 um)
Information on dilution 稀釋相關資訊: Higher dilutions of resists may cause gel formation of the polymers which leads to particle deposition in the resist film during the coating step. Diluted resists should therefore be subjected to ultra-filtration (0.2 μm) prior to use. In most cases it is more advantageous to adjust the desired film thickness by varying the spin speed or to utilize a pre- adjusted resist. Special adjustments of thickness values are possible on request for an additional charge.
Formula for dilutions 稀釋計算式: Example: Starting with a resist with 35 % solids content (AR-P 3510), a solids content of 31 % is desired. Requested is the amount of thinner AR 300-12 in g which has to be added to 100 g resist with 35 % solids content (mass m in g, solids content c /100).
If 100.0 g resist (35 % solids content = AR-P 3510) are diluted with 12.9 g thinner in defined manner, 112.9 g diluted resist (31 % solids content = AR-P 3540) will be obtained. With this dilution, the film thickness is reduced from 2.0 to 1.4 μm at a spin speed of 4000 rpm.