Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

The authoritative public forum
for Metal Finishing since 1989
-----

Want to etch SiO2 but not ZnO

Hi,

My substrate contains an array of SiO2 and ZnO. I wish to etch only the SiO2. After using concentrated HF, both SiO2 and ZnO disapeared. Is HF an etchant of ZnO as well? Can you suggest other suitable etchants?

Gloria Cheng
student - Singapore
2004

Use Buffered Oxide Etch. (BOE) The solution consists of Ammonium fluoride, and Hydrofluoric acid.

Ted Eisenbach
- Mountain Top, Pennsylvania, USA
2004

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: