WEEK 9

WEEK 9

Title of Activities : PCB Etching

Objective : To remove unwanted copper and leaving the track circuit

Activities/ Procedure :

1) After we have completed PCB layout design last week, we continued our work this week by ironing OHP paper to PCB using standard iron. It requires approximately 15 minutes to make OHP paper strongly attached to PCB.

Ironing OHP paper into PCB

2) After ironing process,then etching take place. We dissolve etching powder with cold water to make etching liquid. After that, we shake that mixture to ensure unwanted copper are completely vanish from PCB. This method requires about 30-40 minutes depending on size of circuit.

Etching process and after etching

Problem Encountered : 

This procedure requires close inspection as etching liquid may damages whole circuit which means we need to iron another circuit.

Conclusion :

Based on what we observed, we can see that this method requires a lot of time and observation. However,this method are applicable if there are not etching machine around/