) ▁devices . ▁ ▁Sum it omo ▁Electric ▁produced ▁optical ▁fi ber ▁well ▁ahead ▁of ▁other ▁manufact ur ers , ▁taking ▁note ▁of ▁the ▁product ' s ▁great ▁capacity ▁for ▁vol umin ous , ▁speed y , ▁and ▁assured ▁data ▁transmission , ▁ideal ▁for ▁the ▁advanced ▁information ▁age ▁that ▁was ▁to ▁come . ▁In ▁ 1 9 8 6 , ▁Sum it omo ▁Electric ▁developed ▁Z - fi ber , ▁pure ▁sil ica ▁core ▁fi ber ▁with ▁the ▁world ' s ▁lowest ▁transmission ▁loss . ▁This ▁has ▁supported ▁the ▁construction ▁of ▁optical ▁communication ▁networks , ▁such ▁as ▁its ▁wide ▁use ▁in ▁many ▁sub marine ▁c ables . ▁ ▁Sum it omo ▁Electric ' s ▁optical ▁fib ers ▁ranks ▁among ▁the ▁best ▁in ▁optical ▁transmission ▁networks ▁and ▁optical ▁communication ▁devices . ▁ ▁Electron ics ▁The ▁Sum it omo ▁Electric ▁Group ' s ▁electron ics ▁division ▁supplies ▁various ▁products ▁to ▁manufact ur ers ▁of ▁smart ph ones , ▁flat - screen ▁televis ions , ▁and ▁other ▁highly ▁advanced ▁electronic ▁goods . ▁Product s ▁include ▁base ▁material , ▁w iring , ▁and ▁components ▁for ▁compact ▁and ▁light weight ▁devices ▁with ▁high ▁functionality , ▁such ▁as ▁flexible ▁printed ▁circ uits ▁( F PC s ), ▁electronic ▁w ires , ▁heat - sh r ink able ▁tub ing , ▁fine ▁polym er ▁products , ▁and ▁comp ound ▁sem icon duct ors . ▁Capital izing ▁on ▁comp ound ▁sem icon duct or ▁development ▁and ▁manufact uring - know ledge ▁accum ulated ▁over ▁many ▁years , ▁Sum it omo ▁Electric