Explain contact printing, Chemical Engineering

Assignment Help:

Contact Printing

In contact printing, the resist-coated silicon wafer is bring into physical contact with the glass photo mask. The wafer is held on a vacuum chuck, and the entire assembly rises until the wafer and mask contact each other. The photoresist is exposed with UV light while the wafer is in contact position with the mask. Because of the contact among the resist and mask, very high resolution is possible in contact printing (e.g. 1-micron features in 0.5 microns of positive resist). The problem with contact printing is that debris, trapped among the resist and the mask, can damage the mask and cause defects in the pattern.

 


Related Discussions:- Explain contact printing

Loci.., how 2 construct a loci?

how 2 construct a loci?

Flash and fire points, Q.   Define flash and fire points and its determinat...

Q.   Define flash and fire points and its determination.                                 OR Write short note on: Flash and fire points. Ans. Flash and fire points:

Polymers.., what are the merits and demerits of free radical

what are the merits and demerits of free radical

Nitroparaffins, will u provide chemical properties of nitroparaffins and it...

will u provide chemical properties of nitroparaffins and its block diagram for preparation of nitroparaffins?

Explain loss angle, Explain Loss Angle Loss Angle can be described a...

Explain Loss Angle Loss Angle can be described as the arc-tangent of the electrical dissipation factor.

Properties of filament and contact materials, Properties of filament and co...

Properties of filament and contact materials. The Filament materials must have low resistance temperature co-efficient, high melting point, high mechanical strength, ductility

Hardness of water, Formulas for determining temporary and permanent hardnes...

Formulas for determining temporary and permanent hardness

Stiochiometric and composition relationships, how to calucuate weight% of h...

how to calucuate weight% of hydrogen sulphate when density =20 and temparature =80 are given

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd