DIY Flexible Printed Circuits: 5 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30

Ua koj tus kheej ib leeg-sided saj zawg zog luam tawm cov kab hluav taws xob siv lub tshuab luam ntawv zoo, tooj liab-coated polyimide zaj duab xis, thiab cov khoom siv hluav taws xob sib xyaw ua ke siv tshuaj lom neeg.

Koj yuav pom flex PCBs hauv ntau lub xov tooj ntawm tes lossis cov khoom siv me me zoo sib xws. Flex PCBs tau txais txiaj ntsig los ua cov kab hluav taws xob me me thiab cov khoom sib dhos yooj yim heev. Txawm li cas los xij, ob peb lub khw tseem tsis tau ua kev cai hloov pauv PCBs rau tus nqi tsim nyog hauv qhov me me.

Kauj Ruam 1: Tau Tooj Co-Coated Film

Tau txais qee cov ntawv nyias ntawm polyimide uas muaj tooj liab ntawm ib lossis ob sab. Polyimide yog cov polymer daj uas muaj qhov kub yaj thiab qee zaum hu ua Kapton. Ib hom uas muaj tooj liab-coated polyimide yog DuPont "Pyralux" khoom siv. Cov ntawv Pyralux tuaj hauv ntau ntau yam sib txawv ntawm polyimide tuab, tooj liab tuab thiab nplaum tuab ("nplaum" yog nruab nrab ntawm tooj liab thiab polyimide tuav txhua yam ua ke.) Tooj tooj liab tau muab hauv oz ib square taw, thaum nplaum thiab Kapton tuab tau muab rau hauv mil (1 mil = 0.001 inch). Pyralux LF7062 (daim duab) muaj 1/2 oz Cu, 1/2 mil nplaum thiab 1 mil Kapton. Qhov no ua haujlwm tau zoo tab sis yog me ntsis thiab crinkly rau lub tshuab luam ntawv los daws. LF9120 muaj 1 oz Cu, 1 mil nplaum thiab 2 mil Kapton - zoo li ua haujlwm zoo tshaj plaws hauv tshuab luam ntawv LF9210 muaj 2 oz Cu, 1 mil nplaum thiab 1 mil Kapton - nruj dua, tab sis ua haujlwm tau zoo Lwm cov kev xaiv yog ob tog tooj liab (cov qhaub cij ntawm Cu/Kapton/Cu tuav ua ke nrog cov nplaum) thiab cov roughened nto, qhia los ntawm R ntawm qhov kawg ntawm tus lej. Cov ntawv roughened thiab daim ntawv ob tog ua haujlwm OK. Txawm li cas los xij, Pyralux nrog 2 oz lossis tooj liab tuab tuaj yeem nyuaj rau pub rau lub tshuab luam ntawv, tshwj xeeb tshaj yog tias muaj tooj liab ntawm ob sab. Saib seb koj puas tuaj yeem tau txais cov qauv dawb los ntawm DuPont. Qee zaum, cov ntawv Pyralux tig rau ntawm eBay. Cut cov ntawv Pyralux mus rau 8.5x11 lossis 8.5x14 ntiv tes nrog txiab lossis riam. Tsis txhob smudging tooj liab nrog cov ntiv tes lossis cov roj, uas tuaj yeem thaiv cov kua nplaum tom qab. Txhawm rau tiv thaiv lub tshuab luam ntawv, sim ua kom cov npoo sib npaug thiab tsis muaj burrs.

Kauj Ruam 2: Siv Lub Tshuab Luam Ntawv

Rau kev luam tawm ncaj qha rau ntawm zaj duab xis tooj liab, nrhiav lub tshuab luam ntawv tawv. Cov no feem ntau tsis meej pem nrog cov tshuab luam ntawv laser, tab sis hloov pauv luam tawm cov quav ciab. Tsis zoo li feem ntau cov inkjets, siv quav ciab ua ib txheej tiv thaiv zoo rau tooj liab, thiab tsis zoo li lub tshuab luam ntawv laser, cov tshuab luam ntawv tawv tsis cia siab rau hauv zos them cov ntawv nto, uas tuaj yeem muaj teeb meem thaum ntawv hloov los ntawm daim ntawv tooj liab.

Qee tus qauv yog Tektronix Phaser 840, 850, 860, thiab Xerox Phaser 8200, 8400, 8500, 8560, thiab 8860. Koj yuav pom ib qho hauv chaw ua haujlwm. Feem ntau Phaser cov qauv yog cov tshuab luam ntawv laser tas li, yog li tshawb xyuas hauv qab lub hau rau cov khoom ua kua nplaum (daim duab) yog tias koj tsis paub meej. Yog tias koj tsis muaj peev xwm nkag mus rau lub tshuab luam ntawv xim, "toner transfer" hlau ntawm txoj hauv kev, siv lub tshuab luam ntawv laser, tuaj yeem hloov theem no.

Kauj Ruam 3: Luam tawm ntawm Pyralux

Kos tus qauv tsim hauv ib qho program program, tom qab ntawd siv phau ntawv pub rau tais los luam nws ntawm koj daim ntawv Pyralux hauv dub. Cyan, magenta, daj, ntsuab (50/50 cyan+daj), liab (50/50 daj+magenta) kuj zoo li ua haujlwm, tsuas yog zam lub teeb pom kev uas muaj qhov me me ntawm cov keeb kwm yav dhau dawb. Cov cheeb tsam luam tawm yuav raug tiv thaiv nrog siv quav ciab, thiab cua tuaj raws li tooj liab taug qab ntawm koj qhov kev teeb tsa.

Nco tseg ntxiv 3-7-08: Siv "kev daws teeb meem siab" lossis "yees duab" hom thaum luam ntawv. Qhov kev teeb tsa lub tshuab luam ntawv no feem ntau muaj nyob hauv "Sau Teeb" cov ntawv qhia zaub mov ntawm koj qhov program. Hom kev daws teeb meem luam tawm qeeb dua thiab zoo li txhawb nqa cov nplaum zoo dua rau tooj liab. 10 mil (250-micron) cov kab dav thiab qhov chaw tau luam tawm los ntawm Tektronix Phaser 850, uas yog tus qauv qub. Hauv Phasers feem ntau sab tooj liab yuav tsum tig ntsej muag thaum nws mus rau hauv phau ntawv pub mis thiab tawm sab nraud. Muab me ntsis thawb yog tias phau ntawv pub cog cog muaj teeb meem thawb rau hauv daim ntawv (feem ntau yuav muaj cov ntawv tuab dua)

Kauj ruam 4: Etch Nws

Muab daim ntawv luam tawm hauv ferric chloride (tooj liab etchant) tsawg kawg 5 feeb. Khaws tus cwj pwm los ntawm koj lub qhov muag thiab tawv nqaij. Lub sij hawm khawb yuav nyob ntawm qhov ntsuas kub, tooj liab tuab thiab lwm yam kev mob, siv sijhawm ntev li 25 feeb, yog li khaws saib rau thaj tsam tooj liab kom yaj thiab zaj duab xis polyimide los nthuav tawm. Npau suav nrog lub twj tso dej thoob dej yug ntses, thiab ua kom sov txog 35-40 C yuav pab tau cov ntawv ua kom sai dua thiab sib npaug.

Cov ciab uas tseem tshuav tuaj yeem txhuam nrog ScotchBrite ncoo thiab dej sov, lossis isopropyl cawv (rub cawv). Qhov no tuaj yeem siv dag zog.

Kauj ruam 5: Populate Pawg Thawj Coj

Flex PCB tam sim no tau npaj los txiav sib cais rau hauv cov kab hluav taws xob me me (yog tias qhov ntawd yog koj li phiaj xwm) thiab txhawm rau txhawm rau. Koj tuaj yeem kaw nws mus rau ib qho ntawm cov hlau lossis cov iav fiberglass ib txwm ua los tuav nws ruaj khov thaum ua haujlwm rau nws. "Tinnit" npib tsib xee plating tov lossis zoo sib xws tuaj yeem siv los ua kom yooj yim dua rau solder rau, tab sis cov ntawv tshiab tshiab thiab ntxuav tau yooj yim PCB yooj yim soldered raws li yog.

Vim tias nws yog 1-sided PCB, tsis muaj qhov, nws yog qhov muaj txiaj ntsig tshaj plaws li cov kab hluav taws xob me me lossis ua lub rooj tsav xwm rau ntu ntu ntu. Siv cov neeg dhia dhia yog tias tsim nyog rau kev taug kom hla ntawm koj qhov kev teeb tsa.