Mac X-code 實驗室-4"~12" 製程工程師
- Jun 04 Sat 2011 07:48
- Apr 13 Wed 2011 20:24
- Apr 13 Wed 2011 15:00
From Encyclopedia of Human Disease Diagram by Mitsuo Hattori and Okajima , at Page 162,
胃的構造和功能 ~ 胃液是無色透明, 帶有些微黏性的酸性液體, 胃液的成份幾乎都是水, ㄧ天的分泌量約為 1.5 liter. 如果我們馬上喝下 500c 的熱湯, is good or bad? 是否 香港人的養生之道 是 空腹時 喝熱湯是可用實驗證明其有效性. ㄧ碗 500cc 的熱湯, 可馬上 dilute 胃酸嗎？是否可增加 維生素的吸收? 中藥的 藥湯 是比 藥粉有效的.
- Apr 12 Tue 2011 21:40
- Apr 11 Mon 2011 23:13
- Apr 06 Wed 2011 11:43
- Apr 05 Tue 2011 09:12
- Apr 05 Tue 2011 08:50
Just remebered, when i was processing 5" Si wafer on 1996, we were using Al-1%Si-0.5%Cu. But on the street of wafer, sometimes, there were Si residue. When we cut the crosssection on street ( before Metal etch), Al-Si-Cu/Si wafer, comparing 1% Si and 100% Si, 99% Al and 0 % Al, 0.5% Cu and 0% Cu, here comes "diffusion" for Al, Cu and Cu at high temperature. When we use chemical metal etch, the etch solution can not etch away Si, then, Si residues remains on the wafer. Those are very interesting things happen on the wafer.
However, when we think about our blood, our blood also have several doping materials, we can not just easily treat our blood as " Pass"or " Scrap". If our blood has residue, what can we do? flush away? use chemical to clean? or just leave or ignore these residues there. At least, we need a "clean blood" in our body.
- Apr 04 Mon 2011 23:27
At page 20, 2/3 of human body is Water. 1/3 of those water is called " Extracellular Fluids", and 2/3 of those water is called " Intracellular Fluids". That's inside or outside of cellular.
Extracellular fluids has Na+ and K+....etc. For example, Na+ is 0.85%, our kidney will adjust Na+ within +-0.05. Just likes semiductor fab, what we are doing is making our solutions and solvent within a very tiny range at the temperature. For example, 6:1 BOE at 22+-0.5C, the etch rate(for Thermal Oxide) will keep at 1200A+-100A/min. ( Hope my memory is correct).
- Apr 04 Mon 2011 21:07
When I was Etch process engineer in Holtek fab ( merged by UMC), what we did to clean equipments were " flush" and " purge". For chemical stations ( H2SO4+H2O2, Hot H3PO4, BOE.....etc), using D.I. water to do QDR( Quick Dump Rinse) and clean pipelines or tubes. A lot of water is must. After PM (Preventive Maintainese), we measured water resistivity. Higher is better. When pass the spec ( specification), the chemical station will key to " Operation".
So, how we treat our body, do we drink a lot of water to clean our boby? it is a very interesting question.
- Apr 04 Mon 2011 09:13
水是個奇妙的東西, 在不同氣壓 , 不同溫度之下, 會有氣相(gas) 液相 (liquid) 固相 (solid) , 且有 doping 的情形下, 其 固到液的溶點會不同, 如食鹽水的溶點會與純水不同. 在 液面壓力不同的情形下, f.p. and b.p. are different. For example, 在1 atm時，水的凝固點(f.p.)為0C，沸點(b.p.)為100℃。But, pressure wok, the pressure will higher than 1 atm, the f.p. is higher. And, 水在4℃(精確值為3.98℃)時的體積最小、密度最大，D = 1g/mL