Homework_4_Solution

Homework_4_Solution - the interior of the liquid and toward...

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Dr. Byoung Hee You TECH 4392, MFGE 4392, and TECH 5392 Solutions: Homework#4 1. What are four states of materials? Ans) Solid, liquid, gas, and plasma. 2. State three temperature scales using the boiling and freezing point of water and room temperature? Ans) 3. State the formula for pressure, density, and stress. Ans) Pressure = (force/area)
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Dr. Byoung Hee You 4. What is surface tension? Draw high and low surface tensions? Ans) It is the energy to increase the surface area of contact. To increase surface area, liquid molecules must break intermolecular attraction forces and move away from
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Unformatted text preview: the interior of the liquid and toward its surface. 5. What is CTE? Ans) Coefficient of thermal expansion (CTE) 6. List three common acids used in wafer fab. Ans) Hydrofluoric acid, Hydrochloric acid, Sulfuric acid, BOE, Phosphoric acid, Nitric acid, Boron Tribromide, and Phosporus Oxychloride. 7. List three common bases used in wafer fab. Ans) Hydrogen peroxide, Ammonium hydroxide, Potassium hydroxide, and Tetramethyl ammonium Hydroxide. 8. List three common solvents used in wafer fab. Ans) Deionized Water, Isopropyl alcohol, Trichloroethylene, Acetone, and Xylene....
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Homework_4_Solution - the interior of the liquid and toward...

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