<p>A substrate ( 1 ) having a first groove ( 4 ) is provided with a protrusion ( 3 ) on the first groove ( 4 ). This protrusion ( 4 ) preferably has a top with an apex angle of 30 to 150 degrees and results in a controlled breaking of the substrate ( 1 ) and a minimum of loss due to deviations of the crack initiated at the protrusion ( 4 ).</p>
申请公布号
EP1395406(A1)
申请公布日期
2004.03.10
申请号
EP20020733073
申请日期
2002.05.27
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
BOUTEN, PETRUS, C., P.;IN'T VELD, FREDERIK, H.;WEHRENS, ROGER, M., H., G.
