aclm/semiconduct$ AND aclm/microwave AND aclm/("heterostructure field-effect transistor" or hfet$)
0
1
0%
aclm/semiconduct$ AND aclm/microwave NOT aclm/("heterostructure field-effect transistor" or hfet$) AND spec/("heterostructure field-effect transistor" or hfet$)
1
5
20%
aclm/semiconduct$ NOT aclm/microwave AND aclm/("heterostructure field-effect transistor" or hfet$) AND spec/microwave
12
6
200%
NOT aclm/semiconduct$ AND aclm/microwave AND aclm/("heterostructure field-effect transistor" or hfet$) AND spec/semiconduct$