The inkjet printer head 4, wherein {TAIL ~ said protective layer} is of at least one material selected from the group consisting of silicon oxide, {HEAD ~ silicon nitride}, silicon carbide, and tantalum 
The inkjet printer head 4 , wherein { TAIL ~ said protective layer } is of at least one material selected from the group consisting of silicon oxide , { HEAD ~ silicon nitride } , silicon carbide , and tantalum
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH