Assertion: circuit board's layer | /r/MadeOf | an insulator material
Facets:
Source sentences:
text: In addition, the above-mentioned first layer 3 is formed by an insulator material having a high etching rate, while the above-mentioned second layer 4 is formed by an insulator material having a low etching rate.
text: In addition, the above-mentioned first layer 3 is formed by an insulator material having a high etching rate, while the above-mentioned second layer 4 is formed by an insulator material having a low etching rate.