{TAIL ~ The method} of manufacturing {HEAD ~ a liquid jet head} 10, further comprising, after the groove formation step: 
{ TAIL ~ The method } of manufacturing { HEAD ~ a liquid jet head } 10 , further comprising , after the groove formation step :
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH