Excessive-performance plastics play an important position within the semiconductor business. Manufacturing a semiconductor is a fancy course of. It begins with silicon wafers and a self-contained manufacturing facility referred to as a fab which will price as a lot a a number of billion to assemble. The central a part of a fab is the clear room.
Mud inside the clear room is rigorously managed. Even the smallest speck of duct is bigger than a microcircuit and might smash an IC. Moreover, the ability is dampened in opposition to vibration and the temperature and humidity are rigorously maintained to attenuate static electrical energy.
Built-in circuits are manufactured utilizing processes corresponding to photolithography, etching, cleansing, skinny movie deposition and sharpening. It takes some 270 chemical compounds and gasses1 to supply an built-in circuit. Many of those are extraordinarily corrosive: nitric acid, hydrochloric and hydrofluoric acid, and ozone to call a couple of. Metals will corrode when uncovered to those chemical compounds, producing unacceptable ranges of particulates and gear failures….however there are a selection of excessive efficiency plastic mold that carry out very properly in these excessive situations.
Here’s a record of the highest ten efficiency standards for prime efficiency plastics within the semiconductor business:
1. Wonderful chemical resistance properties to keep away from corrosion.
2. Low particle technology for higher product yield.
three. Low outgassing and low moisture absorption traits in vacuums.
four. Excessive temperature efficiency.
5. Electrical insulating properties, low dielectric fixed.
6. Dimensional stability for longer half life, creep resistance.
7. Low metallic ion content material thus low ranges of extractables in excessive purity chemical compounds.
eight. Wonderful machinability.
9. Flame retardant.
10. Low thermal conductivity.
So, how are these excessive efficiency plastics used? First, you will need to perceive that there are a lot of kinds of semiconductor processing gear. Excessive efficiency plastics are vital in all phases of semiconductor manufacturing however maybe none greater than in moist benches. These machines perform moist chemical processes corresponding to acid etching in addition to chemical rinsing and drying. Moist benches permit for max course of purity and decrease the specter of chemical carry-over or the contamination of wafers throughout drying.
Watch this youtube video of a moist bench in motion!
Excessive efficiency plastics are used extensively in one of these gear, plastics corresponding to PVDF (poly-vinylidene difluoride); PP2 (polypropylene); PTFE (polytetrafluroethylene); FEP (fluorinated ethylene propylene; PFA (perfluoroalkoxy); CPVC (chlorinated polyvinyl chloride); ECTFE (ethylene chlorotrifluoroethylene) and PCTFE (polychlorotrifluoroethylene) are a number of the extra frequent. These excessive efficiency plastics are used to make tanks, fittings, screws, gaskets, spacers, housings, gaskets, wafer carrying trays, handles, hinges, sheet, tubing, and pumps. They’re extremely chemical resistant and stand-up to excessive environments.
With out excessive efficiency plastics, our lap tops, cellphones and huge display TVs, certainly the data age itself, won’t have been potential.
1 In keeping with HANDBOOK OF CHEMICALS AND GASES FOR THE SEMICONDUCTOR INDUSTRY revealed by Wiley.