| LI Jia,LI De-liang,MO Ling.Study on Nitrate Acidic Etcher[J],39(3):87-89 |
| Study on Nitrate Acidic Etcher |
| Received:March 31, 2010 Revised:June 10, 2010 |
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| DOI： |
| KeyWord:nitric acid cupric nitrate etcher |
| Author | Institution |
| LI Jia |
Central South University of Forest and Technology, Changsha , China |
| LI De-liang |
Central South University of Forest and Technology, Changsha , China |
| MO Ling |
Central South University of Forest and Technology, Changsha , China |
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| Abstract: |
| Acid etcher which nitric acid is the main component has been studied. Static etching method was used to investigate the influencing of several independent factors by measuring the etching rate of PCB in etching solution and undercutting level. The orthogonal test result shows that the best components and process conditions of nitrate acidic etcher are the concentration of copper ion(140± 10)g/ L, the concentration of nitric acid(2.5± 0.5)mol/ L, the temperature(50± 5)℃ connecting with orthogonal experiment. In this condition, the etching rate reaches 10μm/min for static process and undercutting level is low. Moreover, the effects of smoke suppressant on etching rates have been discussed. |
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