Mpaghara Ngwa: A na-eji ya na ọkụ ụlọ ọrụ mmepụta ihe, ngwa ụlọ, ọkụ ụlọ ọrụ, metallurgy, igwe, ụgbọ elu, ụgbọ ala, agha na ụlọ ọrụ ndị ọzọ na-emepụta ihe ndị na-ekpo ọkụ na ihe ndị na-eguzogide.

Ndị na-emegide agbakwunyere na bọọdụ wiwi ebi ebi ga-abụ ihe na-enye aka maka mbelata ngwugwu nwere ntụkwasị obi dị elu yana arụmọrụ eletrik ka mma.Ijikọ ọrụ resistor n'ime mkpụrụ nke laminate na-ahapụ ebe elu PWB nke akụrụngwa pụrụ iche na-eri, na-eme ka arụmọrụ ngwaọrụ dịkwuo elu site na ntinye nke ihe ndị ọzọ na-arụ ọrụ.Nickel-chromium alloys nwere ihe mgbochi eletrik dị elu, nke na-eme ka ha dị irè maka ojiji na ngwa dị iche iche.A na-eji silicon na aluminom mee nickel na chromium iji kwalite nkwụsi ike ọnọdụ okpomọkụ ma belata ọnụọgụ nguzogide okpomọkụ.A na-edobe oyi akwa mgbochi ihe nkiri dị gịrịgịrị dabere na nickel-chromium alloys na-aga n'ihu na mpịakọta nke foil ọla kọpa iji mepụta ihe maka ngwa resistor agbakwunyere.Igwe ihe nkiri na-egbochi ihe nkiri dị gịrịgịrị sandwiched n'etiti ọla kọpa na laminate nwere ike họrọ nke ọma ka ọ mepụta resistors pụrụ iche.Kemịkalụ maka etching bụ ihe a na-ahụkarị na usoro mmepụta PWB.Site n'ịchịkwa ọkpụrụkpụ nke alloys, ụkpụrụ mgbochi mpempe akwụkwọ sitere na 25 ruo 250 ohm / sq.na-enwetara.Akwụkwọ a ga-atụnyere ihe nickel-chromium abụọ n'ime usoro etching ha, ịdị n'otu, njikwa ike, arụmọrụ ọkụ, adhesion na etching mkpebi.