Ua ntej smplehigh zaus boards, DFM manufacturability tshuaj xyuas yuav tsum tau ua los txuas qhov sib txawv ntawm lub xeev tsim qauv zoo tagnrho thiab cov txheej txheem ntau lawm, txhawm rau zam kom tsis txhob nthuav tawm cov txheej txheem me me rau hauv cov teeb meem tsis ua haujlwm loj hauv cov xwm txheej siab.
daws qhov sib txawv ntawm qhov tseem ceeb ntawm kev simulation thiab ntau lawm
High zaus signals yog rhiab heev rau cov txheej txheem tsis. Cov pa hluav taws xob simulations ua ntej ua rau cov kab hluav taws xob zoo kawg nkaus thiab cov khoom siv tsis sib xws, tab sis muaj tsib hom kev sib txawv hauv qhov tseeb:
Tom qab etching, txoj hlua yuav dhau los ua trapezoidal, thiab kev txiav hauv qab yuav ua rau 1-3 Ω impedance hloov
Qhov sib txawv ntawm Dk ntawm cov khoom sib txawv ntawm tib hom ntawm lub rooj tsavxwm tuaj yeem ncav cuag ± 0.05, ua rau muaj kev hloov pauv ntxiv ntawm 1-2 Ω impedance.
Qhov saum npoo roughness Rz ntawm cov ntawv ci tooj liab yog nyob rau hauv thaj tsam ntawm 1.5-8 μ m, uas ua rau muaj kev cuam tshuam ntxiv ntawm 0.1-0.5dB ib nti.
Lub thickness fluctuation ntawm nruab nrab tom qab nias lub semi-kho daim ntawv yog ± 0.025mm, uas ua rau ib tug impedance sib txawv ntawm 1-2 Ω
Iav weaving nyhuv ua rau ± 0.5 Ω periodic impedance ripple
Tom qab lub superposition ntawm tsib hom kev sib txawv, qhov phem tshaj qhov sib txawv ntawm tus nqi simulated thiab qhov tseeb impedance ntawm cov khoom tiav tuaj yeem ncav cuag 5-8 Ω, deb tshaj qhov kam rau ua ntawm ± 3% 5% rau high-frequency boards, ncaj qha ua rau cov khoom tsis ua hauj lwm. Kev tshuaj xyuas DFM yuav xa cov chaw tsim khoom cov txheej txheem cov txheej txheem ua ntej, nqaim qhov sib txawv ntawm kev simulation thiab kev sim tiag tiag los ntawm qhov tsim.
Sib npaug ntawm ob tus qauv ntawm cov txheej txheem tawm los thiab kev ua haujlwm RF
DFM ntawm cov PCBs zoo tib yam nkaus xwb tsom rau kev ua tau zoo, thaum DFM ntawm cov rooj tsavxwm siab yuav tsum npog peb qhov loj me ib txhij:
Lub rooj tsavxwm thiab laminate tshuaj xyuas: Paub meej tias Dk / Df tsis ntawm Rogers thiab lwm lub rooj tsavxwm siab sib haum rau lub hom phiaj zaus band, txheeb xyuas qhov sib luag ntawm lub laminate kom tsis txhob muaj kev sib tsoo tom qab lamination, xyuas kom impedance stability thiab SMT vuam yield
Impedance thiab kis kab kev tshuaj xyuas: Txheeb xyuas seb qhov kev tiv thaiv kev tiv thaiv ntawm tus qauv tsim puas nyob rau hauv cov chaw tsim khoom cov txheej txheem muaj peev xwm, paub meej tias lub dav hlau siv hauv av hauv qab cov kab hluav taws xob siab tsis zoo tsis muaj qhov qhib, khaws cov nyiaj txaus etching, thiab tiv thaiv cov teeb meem cuam tshuam los ntawm impedance mismatch.
Los ntawm lub qhov thiab cov txheej txheem tshwj xeeb tshuaj xyuas: Ntsuam xyuas seb qhov los ntawm qhov seem seem puas xav tau rov qab kho qhov drilling, nruj me ntsis txwv tsis pub siv cov tin spraying tshuab rau high-frequency boards, thiab pom zoo kom yuav tsum tau immersion kub / silver nto kho kom tsis txhob ua puas lub teeb liab ntawm daim tawv nqaij.
Qhov tseem ceeb txo qis R & D thiab cov nqi tsim khoom loj
Cov ntaub ntawv ntsuam xyuas kev lag luam qhia tau hais tias lub rooj tsav xwm muaj ntau zaus uas tau ua tiav DFM tshuaj xyuas:
Qhov nruab nrab ntawm PCB hloov kho tau txo los ntawm 2.8 txog 1.2, txo cov nqi kho dua los ntawm 57%
Tiv thaiv ntau tshaj 70% ntawm cov teeb meem kev tsim khoom loj ua ntej thiab zam kom tsis txhob muaj cov khoom siv ntau zaus thiab cov laug cam
Hais txog qhov kev lag luam ntau zaus qhov mob ntawm "cov qauv kev ua tau zoo ua tau raws li cov qauv, batch yield poob qis" los ntawm qhov chaw, txo qhov kev tshawb fawb thiab kev loj hlob.