ailand , ▁improvement ▁of ▁tele com ▁networks ▁in ▁Niger ia , ▁memb rane ▁technology ▁for ▁waste ▁water ▁treatment ▁in ▁Korea , ▁and ▁bridge ▁construction ▁in ▁Germany . ▁ ▁Sum it omo ▁Electric ' s ▁elect rical ▁w iring ▁har ness ▁systems , ▁which ▁are ▁used ▁to ▁send ▁information ▁and ▁energy ▁to ▁autom ob iles , ▁hold ▁the ▁largest ▁market ▁share ▁in ▁the ▁world . ▁Sum it omo ▁Electric ▁also ▁continues ▁to ▁be ▁the ▁leading ▁manufact urer ▁of ▁composite ▁sem icon duct ors ▁( G a As , ▁Ga N , ▁In P ), ▁which ▁are ▁widely ▁used ▁in ▁sem icon duct or ▁las ers , ▁LED s , ▁and ▁mobile ▁tele communic ations ▁devices . ▁ ▁The ▁company ▁is ▁one ▁of ▁the ▁top ▁three ▁manufact ur ers ▁in ▁the ▁world ▁of ▁optical ▁fi ber . ▁ ▁History ▁▁ 1 8 9 7 ▁to ▁ 1 9 5 0 ▁▁ 1 8 9 7 ▁- ▁Sum it omo ▁Co pper ▁Rol ling ▁Works ▁was ▁founded ▁▁ 1 9 0 0 ▁- ▁Start ed ▁production ▁of ▁co ated ▁w ires ▁▁ 1 9 0 8 ▁- ▁Start ed ▁production ▁of ▁power ▁c ables ▁▁ 1 9 0 9 ▁- ▁Start ed ▁trial ▁production ▁of ▁tele communic ation ▁c ables ▁▁ 1 9 1 1 ▁- ▁Est ab lished ▁Sum it omo ▁Electric ▁W ire ▁& ▁C able ▁Works ; ▁La id ▁first ▁Japan - made ▁high - vol t age ▁under ground ▁c ables ▁▁ 1 9 1 6 ▁- ▁Open ed ▁a ▁new ▁factory