Inventor · disambiguated record
Yohei Wakai
Also filed as: WAKAI YOHEI
17 granted patents·87 citations·filing 2007–2016
92Inventor score
Top patents by PatentIndex Score
17 records- 0195US7781790B2Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the sameNICHIA CORP·Filed 2007·Granted Aug 24, 2010·29 cites·15 claims
- 0290US8883529B2Method for manufacturing semiconductor light emitting deviceNICHIA CORP·Filed 2013·Granted Nov 11, 2014·5 cites·16 claims
- 0389US8236591B2Semiconductor light emitting element and method for manufacturing the sameICHIHARA TAKASHI·Filed 2008·Granted Aug 7, 2012·13 cites·28 claims
- 0488US8847262B2Sapphire substrate having triangular projections with bottom sides formed of outwardly curved linesNICHIA CORP·Filed 2013·Granted Sep 30, 2014·6 cites·15 claims
- 0587US8779463B2Sapphire substrate and nitride semiconductor light emitting deviceNARITA JUNYA·Filed 2011·Granted Jul 15, 2014·11 cites·9 claims
- 0686US8552445B2Semiconductor light emitting device and method for manufacturing the sameWAKAI YOHEI·Filed 2008·Granted Oct 8, 2013·11 cites·26 claims
- 0784US8686457B2Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the sameNICHIA CORP·Filed 2013·Granted Apr 1, 2014·5 cites·21 claims
- 0882US9525103B2Sapphire substrate having elongated projection and semiconductor light emitting device utilizing the sameNICHIA CORP·Filed 2015·Granted Dec 20, 2016·2 cites·7 claims
- 0979US8394652B2Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the sameMINATO SHUNSUKE·Filed 2010·Granted Mar 12, 2013·4 cites·22 claims
- 1066US9159868B2Method for manufacturing semiconductor light emitting deviceNICHIA CORP·Filed 2014·Granted Oct 13, 2015·0 cites·12 claims
- 1159US9490393B2Semiconductor light emitting device with light extraction surfaceWAKAI YOHEI·Filed 2009·Granted Nov 8, 2016·1 cites·9 claims
- 1259US9070814B2LED sapphire substrate with groups of three projections on the surfaceNICHIA CORP·Filed 2014·Granted Jun 30, 2015·0 cites·16 claims
- 1356US9054271B2Method for manufacturing substrate for semiconductor light emitting element and semiconductor light emitting element using the sameNICHIA CORP·Filed 2014·Granted Jun 9, 2015·0 cites·22 claims
- 1456US8847263B2Sapphire substrate having triangular projections with outer perimeter formed of continuous curveNICHIA CORP·Filed 2013·Granted Sep 30, 2014·0 cites·15 claims
- 1551US9012936B2Sapphire substrate having triangular projections with portions extending in direction of substrate crystal axisNARITA JUNYA·Filed 2011·Granted Apr 21, 2015·0 cites·26 claims
- 1649US10381516B2Semiconductor light emitting device having a recess with irregularitiesNICHIA CORP·Filed 2016·Granted Aug 13, 2019·0 cites·27 claims
- 1747US9559253B2Method of manufacturing nitride semiconductor elementNICHIA CORP·Filed 2014·Granted Jan 31, 2017·0 cites·23 claims
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