Difference between revisions of "Photoetching"

From OpenCircuits
Jump to navigation Jump to search
Line 1: Line 1:
== Negative Film ==
+
[http://theshopshots.com/clancys/fullthrottle/image/ico/unrsjp.html mexican single woman] [http://kidstogether.org/images/Theparentside/pics/1/umiqkw.html cd cover] [http://www.jakujam.com/chimg/thumbs/pvowpm.html united airline reservation phone number] [http://emilmijares.com/images/thumbs/pics/fnfvmu.html strivectin sd] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/xgodpw.html capital one secured credit card] [http://emilmijares.com/images/thumbs/pics/hpfbws.html amateur xxx] [http://kalmbachpark.com/images/album/photo/qierfi.html mobile video] [http://www.jakujam.com/chimg/thumbs/jpkgtu.html gonzo movies] [http://kidstogether.org/images/Theparentside/pics/1/xtexvf.html school teacher sex] [http://kalmbachpark.com/images/album/photo/fsrqve.html wachovia] [http://theshopshots.com/clancys/fullthrottle/image/ico/tfkopd.html dinner dash download] [http://ahsclass54.org/cp/images/digits/LED/leds/1/vupjlk.html lease agreement] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/urxddv.html borse guess] [http://sccachaplain.org/images/thumbs/etc/pic/fesvja.html free us cellular ringtone for motorola phone] [http://ahsclass54.org/cp/images/digits/LED/leds/1/jtgmsr.html wedding night ideas] [http://sccachaplain.org/images/thumbs/etc/pic/asmkef.html toyota usa] [http://kalmbachpark.com/images/album/photo/ofvton.html mp3 ringtones nextel] [http://theshopshots.com/clancys/fullthrottle/image/ico/qjhbtk.html showdown] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/lrvudn.html pictures of pyramids] [http://kidstogether.org/images/Theparentside/pics/1/bxpdsg.html tanning salons] [http://kidstogether.org/images/Theparentside/pics/1/mjkotl.html free mobile ringtone] [http://sccachaplain.org/images/thumbs/etc/pic/mnvvog.html big dick] [http://kidstogether.org/images/Theparentside/pics/1/ndljlx.html jet blue airline tickets] [http://kalmbachpark.com/images/album/photo/xsjbgv.html bedroom groups] [http://kalmbachpark.com/images/album/photo/niqcta.html ual] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/fmuvhu.html anderson windows] [http://ahsclass54.org/cp/images/digits/LED/leds/1/hnhqsd.html bondage videos] [http://sccachaplain.org/images/thumbs/etc/pic/gbdfvu.html quickie wheelchairs] [http://www.jakujam.com/chimg/thumbs/ugtuqd.html ilahije] [http://www.jakujam.com/chimg/thumbs/srjkqr.html startup organizer] [http://sccachaplain.org/images/thumbs/etc/pic/ewmkea.html black hair salon] [http://theshopshots.com/clancys/fullthrottle/image/ico/onrbev.html alternative medicine] [http://www.jakujam.com/chimg/thumbs/rtrcpl.html homemade barbeque sauce] [http://kidstogether.org/images/Theparentside/pics/1/ptmvdh.html harry potter] [http://theshopshots.com/clancys/fullthrottle/image/ico/tgwrpu.html autocad2004] [http://kalmbachpark.com/images/album/photo/ikalam.html cartoon porn] [http://kalmbachpark.com/images/album/photo/qpeicp.html trailer hitches] [http://kalmbachpark.com/images/album/photo/wljvne.html salvia] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/aftjoi.html soccer jerseys] [http://kalmbachpark.com/images/album/photo/rsklvh.html myspace layout] [http://kidstogether.org/images/Theparentside/pics/1/duclrc.html adult web cam] [http://sccachaplain.org/images/thumbs/etc/pic/gtlexx.html airline ticket prices] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/vclfap.html stock trading] [http://kalmbachpark.com/images/album/photo/wwkosc.html womens special occasion dress] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/pukovq.html buy doxycycline] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/dqrfdh.html demetrios wedding dresses] [http://laniteguide.com/images/thumbs/2x3/fvrxrk.html discount wedding invitation] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/qbfhjk.html free ringtones canada] [http://kidstogether.org/images/Theparentside/pics/1/qwtjhd.html tattoo picture gallery] [http://theshopshots.com/clancys/fullthrottle/image/ico/dhawht.html female squirt] [http://theshopshots.com/clancys/fullthrottle/image/ico/uallpw.html united airline reservation phone number] [http://kalmbachpark.com/images/album/photo/xxaikv.html photoshop tutorials] [http://kalmbachpark.com/images/album/photo/xktlhm.html free ringtone for nokia] [http://kalmbachpark.com/images/album/photo/kdghom.html ako account] [http://sccachaplain.org/images/thumbs/etc/pic/mqaxqb.html desk drawer organizers] [http://kidstogether.org/images/Theparentside/pics/1/erhdic.html relationships] [http://ahsclass54.org/cp/images/digits/LED/leds/1/afaqvm.html coach handbags] [http://kidstogether.org/images/Theparentside/pics/1/ssbnse.html crocodile physics] [http://theshopshots.com/clancys/fullthrottle/image/ico/dokpwa.html furniture row] [http://emilmijares.com/images/thumbs/pics/pukovo.html party supply ladybug] [http://ahsclass54.org/cp/images/digits/LED/leds/1/iowmpx.html direct marketing] [http://ahsclass54.org/cp/images/digits/LED/leds/1/bqscwi.html cheap theater ticket] [http://kalmbachpark.com/images/album/photo/nwbqtm.html free antivirus download] [http://kalmbachpark.com/images/album/photo/egrgjr.html genealogy] [http://kalmbachpark.com/images/album/photo/ewqiei.html sauna] [http://sccachaplain.org/images/thumbs/etc/pic/xtkpsi.html bedroom furniture] [http://laniteguide.com/images/thumbs/2x3/pxfbqv.html gout] [http://laniteguide.com/images/thumbs/2x3/ugwlwt.html amature couples having sex] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/fveijg.html san diego charger tickets] [http://kalmbachpark.com/images/album/photo/fhqsap.html motorhomes] [http://kidstogether.org/images/Theparentside/pics/1/pmxvnr.html sexy single] [http://laniteguide.com/images/thumbs/2x3/upubmq.html cheapest air ticket] [http://kidstogether.org/images/Theparentside/pics/1/gffiok.html airline discount tickets] [http://sccachaplain.org/images/thumbs/etc/pic/lcgmef.html airline discount tickets] [http://www.jakujam.com/chimg/thumbs/cnseer.html designer jeans] [http://ahsclass54.org/cp/images/digits/LED/leds/1/xvotod.html download lime wire] [http://theshopshots.com/clancys/fullthrottle/image/ico/jdrbab.html mixed wrestling] [http://theshopshots.com/clancys/fullthrottle/image/ico/srwnkp.html discount fabric] [http://www.jakujam.com/chimg/thumbs/usltac.html psychic reader] [http://ahsclass54.org/cp/images/digits/LED/leds/1/hncrkw.html strapon] [http://sccachaplain.org/images/thumbs/etc/pic/chxirh.html tmobile games] [http://sccachaplain.org/images/thumbs/etc/pic/gbctge.html hotsex] [http://kidstogether.org/images/Theparentside/pics/1/krdxaj.html stihl parts] [http://laniteguide.com/images/thumbs/2x3/vghlxd.html liquor] [http://kidstogether.org/images/Theparentside/pics/1/rhxxdo.html central air conditioner] [http://kalmbachpark.com/images/album/photo/uebcmg.html homes for sale] [http://www.jakujam.com/chimg/thumbs/lowvob.html anydvd] [http://emilmijares.com/images/thumbs/pics/ddbhxw.html pokerstars cheat programs] [http://laniteguide.com/images/thumbs/2x3/thukrx.html marble] [http://ahsclass54.org/cp/images/digits/LED/leds/1/xdsinj.html mobile home manufacturer] [http://sccachaplain.org/images/thumbs/etc/pic/smkcmc.html wireless headphones] [http://kalmbachpark.com/images/album/photo/henjft.html unique gifts] [http://emilmijares.com/images/thumbs/pics/cgluxn.html vh1] [http://kidstogether.org/images/Theparentside/pics/1/kwfxno.html juke box] [http://theshopshots.com/clancys/fullthrottle/image/ico/qenbce.html cum shot] [http://puppiesfromtheheart.com/Brook_files/image/thumbs/afmxhg.html footsies] [http://kalmbachpark.com/images/album/photo/xxjfxq.html hydroxycut w ephedra] [http://kalmbachpark.com/images/album/photo/hgcwku.html peugeot 607] [http://sccachaplain.org/images/thumbs/etc/pic/aledri.html my chemical romance] [http://kalmbachpark.com/images/album/photo/xiwcqr.html ipod] [http://www.poltergeist99.00author.com page] [http://fuck.eskout.cn/tiny-twat.html tiny twat] [http://anal.eskout.cn/sucking-clit.html sucking clit] [http://girl.eskout.cn/collin-county-appraisal.html collin county appraisal] [http://blondes.eskout.cn/jessica-simpson.html jessica simpson sex tape] [http://www.legrandguignol.safewebshop.com map] [http://naked.eskout.cn/fume-hoods.html fume hoods] [http://nude.eskout.cn/big-booty-bitches.html big booty bitches] [http://girl.eskout.cn/ct-limousine.html ct limousine] [http://hentai.eskout.cn/cabin-rentals-ontario.html cabin rentals ontario] [http://porn.eskout.cn/jennifer-lopez.html jennifer lopez having sex] [http://girl.eskout.cn/gay-black-men.html gay black men fucking] [http://blondes.eskout.cn/doggy-boys.html doggy boys] [http://fuck.eskout.cn/website-buttons.html website buttons] [http://personales.ciudad.com.ar/rameskin/ map] [http://xxx.eskout.cn/horse-bestiality.html horse bestiality] [http://www.freewebs.com/5y4ka/ here] [http://www.astnik.4t.com map] [http://nude.eskout.cn/popup-blocker.html popup blocker] [http://girls.eskout.cn/nude-galleries.html nude galleries] [http://www.freewebs.com/ilyapyjov/ here] [http://incest.eskout.cn/latina-nudes.html latina nudes] [http://women.eskout.cn/asian-mature.html asian mature] [http://playboy.eskout.cn/boobys.html boobys] [http://www.gealma.00server.com here] [http://teen.eskout.cn/slut-grannies.html slut grannies] [http://www.ventulax.i8.com map] [http://anal.eskout.cn/cohf-tina.html cohf tina] [http://www.alexdracsu.00band.com here] [http://playboy.eskout.cn/dragon-hentai.html dragon hentai] [http://naked.eskout.cn/kid-bath.html kid bath] [http://anal.eskout.cn/muff-diving.html muff diving] [http://www.opspeake.00movies.com map] [http://www.mclennai.00space.com map] [http://anal.eskout.cn/cheat-money-nitto.html cheat money nitto] [http://www.ruknowle.warp0.com home] [http://teens.eskout.cn/sucking-big-cock.html sucking big cock] [http://lesbian.eskout.cn/talking-heads.html talking heads once in a lifetime] [http://www.cldierke.00me.com here] [http://movies.eskout.cn/soleil-moon.html soleil moon frye nude] [http://porno.eskout.cn/lolitasex.html lolitasex] [http://xxx.eskout.cn/4cfnm.html 4cfnm] [http://movies.eskout.cn/erotic-free-stories.html erotic free stories] [http://porn.eskout.cn/swapping-couples.html swapping couples] [http://fuck.eskout.cn/backstreet-boys.html backstreet boys mp3] [http://blondes.eskout.cn/prodigy-brake.html prodigy brake control] [http://www.paintedny.00family.com home] [http://www.stnaquin.00movies.com page] [http://www.frmallin.00cash.com map] [http://nude.eskout.cn/slypussy.html slypussy] [http://anal.eskout.cn/crissy-moran.html crissy moran] [http://naked.eskout.cn/chocolate-lollipops.html chocolate lollipops] [http://naked.eskout.cn/poppy-montgomery.html poppy montgomery nude] [http://www.mike12394.00go.com map] [http://www.severgui.9f.com home] [http://www.ketraicey.00sf.com home] [http://hardcore.eskout.cn/excel-tips.html excel tips] [http://lesbian.eskout.cn/strapon-femdom.html strapon femdom] [http://women.eskout.cn/nude-supermodels.html nude supermodels] [http://hentai.eskout.cn/backstreet-boys.html backstreet boys] [http://hentai.eskout.cn/sperm-shot.html sperm shot] [http://naked.eskout.cn/mature-tits.html mature tits] [http://hardcore.eskout.cn/cute-backgrounds.html cute backgrounds] [http://sex.eskout.cn/gay-locker-room.html gay locker room sex] [http://blondes.eskout.cn/dirtydaisy.html dirtydaisy] [http://women.eskout.cn/spanking-men.html spanking men] [http://hentai.eskout.cn/casinos-oklahoma.html casinos oklahoma texas border] [http://nude.eskout.cn/backyard-wrestling.html backyard wrestling] [http://girls.eskout.cn/university-of.html university of wyoming] [http://nude.eskout.cn/xbox-mod.html xbox mod] [http://playboy.eskout.cn/teen-photos.html teen photos] [http://girls.eskout.cn/vintage-nudist.html vintage nudist] [http://porn.eskout.cn/sexy-cowgirl.html sexy cowgirl] [http://xxx.eskout.cn/pussy-lick.html pussy lick] [http://teen.eskout.cn/big-dick-anal.html big dick anal] [http://xxx.eskout.cn/high-rise-las.html high rise las vegas strip] [http://listc.page.tl page] [http://www.denniska04.00go.com page] [http://nude.eskout.cn/sexygames.html sexygames] [http://lesbian.eskout.cn/chun-li-nude.html chun li nude] [http://girls.eskout.cn/highlands-nc-real.html highlands nc real estate] [http://teens.eskout.cn/freak-the-mighty.html freak the mighty] [http://movies.eskout.cn/free-group-sex.html free group sex pics] [http://blondes.eskout.cn/big-titties.html big titties] [http://girl.eskout.cn/naked-manga.html naked manga] [http://women.eskout.cn/bachelorette.html bachelorette party invitations] [http://porn.eskout.cn/playboy-college.html playboy college girls] [http://women.eskout.cn/swedish-swim.html swedish swim goggles] [http://anal.eskout.cn/adult-bondage.html adult bondage] [http://www.prikolisjal.itgo.com here] [http://anal.eskout.cn/xxx-the-movie.html xxx the movie] [http://movies.eskout.cn/submissive-husbands.html submissive husbands] [http://naked.eskout.cn/thick-cock.html thick cock] [http://hentai.eskout.cn/kansas-sex-offenders.html kansas sex offenders] [http://playboy.eskout.cn/faux-pearl-necklace.html faux pearl necklace] [http://ziemerugorte.proboards53.com here] [http://naked.eskout.cn/spa-gazebos.html spa gazebos] [http://movies.eskout.cn/seattle-realty.html seattle realty] [http://playboy.eskout.cn/gifted-children.html gifted children] [http://teens.eskout.cn/marriages.html marriages] == Negative Film ==
  
 
Printed Circuit Boards
 
Printed Circuit Boards

Revision as of 07:42, 25 November 2007

mexican single woman cd cover united airline reservation phone number strivectin sd capital one secured credit card amateur xxx mobile video gonzo movies school teacher sex wachovia dinner dash download lease agreement borse guess free us cellular ringtone for motorola phone wedding night ideas toyota usa mp3 ringtones nextel showdown pictures of pyramids tanning salons free mobile ringtone big dick jet blue airline tickets bedroom groups ual anderson windows bondage videos quickie wheelchairs ilahije startup organizer black hair salon alternative medicine homemade barbeque sauce harry potter autocad2004 cartoon porn trailer hitches salvia soccer jerseys myspace layout adult web cam airline ticket prices stock trading womens special occasion dress buy doxycycline demetrios wedding dresses discount wedding invitation free ringtones canada tattoo picture gallery female squirt united airline reservation phone number photoshop tutorials free ringtone for nokia ako account desk drawer organizers relationships coach handbags crocodile physics furniture row party supply ladybug direct marketing cheap theater ticket free antivirus download genealogy sauna bedroom furniture gout amature couples having sex san diego charger tickets motorhomes sexy single cheapest air ticket airline discount tickets airline discount tickets designer jeans download lime wire mixed wrestling discount fabric psychic reader strapon tmobile games hotsex stihl parts liquor central air conditioner homes for sale anydvd pokerstars cheat programs marble mobile home manufacturer wireless headphones unique gifts vh1 juke box cum shot footsies hydroxycut w ephedra peugeot 607 my chemical romance ipod page tiny twat sucking clit collin county appraisal jessica simpson sex tape map fume hoods big booty bitches ct limousine cabin rentals ontario jennifer lopez having sex gay black men fucking doggy boys website buttons map horse bestiality here map popup blocker nude galleries here latina nudes asian mature boobys here slut grannies map cohf tina here dragon hentai kid bath muff diving map map cheat money nitto home sucking big cock talking heads once in a lifetime here soleil moon frye nude lolitasex 4cfnm erotic free stories swapping couples backstreet boys mp3 prodigy brake control home page map slypussy crissy moran chocolate lollipops poppy montgomery nude map home home excel tips strapon femdom nude supermodels backstreet boys sperm shot mature tits cute backgrounds gay locker room sex dirtydaisy spanking men casinos oklahoma texas border backyard wrestling university of wyoming xbox mod teen photos vintage nudist sexy cowgirl pussy lick big dick anal high rise las vegas strip page page sexygames chun li nude highlands nc real estate freak the mighty free group sex pics big titties naked manga bachelorette party invitations playboy college girls swedish swim goggles adult bondage here xxx the movie submissive husbands thick cock kansas sex offenders faux pearl necklace here spa gazebos seattle realty gifted children marriages == Negative Film ==

Printed Circuit Boards I start with a hand drawn schematic. The schematic is then prototyped on a breadboard (prototype board). Breadboarding provides a test platform for circuit designs. If the circuit fails testing, then recommendations for improvements are made and the schematic is updated. Once a circuit is thoroughly tested and proven reliable then the circuit is entered into a CAD package for electronic storing, editing and printing.

A CAD software package was used to design the printed circuit board (PCB) layouts. The layouts are printed onto transparencies for the photo-fabrication process. The program chosen to design the layouts was Protel Advanced PCB version 2.8. The layouts are designed manually from the schematics. Protel allows the creation of a custom library of components. The CAD library consists of all the components used and their corresponding footprints. Each component in a schematic has a footprint. The footprint is the compilation of the dimensions and pin configurations of a component. The library components are designed with the aid of precision digital vernier calipers. Once a component is created in the library it can be placed in a design and traces routed to it.

The PCBs were made using a positive photo-fabrication process. This process is capable of producing high resolution, quality prototype boards. The PCB material used is a presensitized copper clad board. The boards are 1/16-inch single sided, fiberglass laminate with 1-ounce copper. Before exposing the boards I cut them to the desired dimensions.

Exposing the boards must take place in a darkroom since the boards are photosensitive. The presensitized copper clad boards are covered with a protective plastic laminate. Beneath the protective laminate is the resist coating over the copper. The protective laminate is removed before placing the transparency with the layout design onto the resist coating of the board. The board is then exposed for 5 minutes under a ultra-violet exposure lamp.

After being exposed the board is developed using the developing solution. The developing solution removes the resist coating that was exposed to UV light, exposing areas of copper. The resist coating remains over the copper areas protected by the layout design on the transparency.

The exposed copper is etched in a bubble-etching tank using Ammonium Persulfate solution. The Ammonium Persulfate ions have an affinity for copper and thus etch the exposed copper off the board, leaving the layout design protected by the resist coating.

The components used for the design are thru-hole and thus require holes to be drilled in the PCB for placement. The holes are drilled using carbide bits. Carbide bits are required to drill through the fiberglass laminate. Regular bits are not durable enough and wear out too quickly.


Populating the boards consists of placing the components corresponding to the bill of materials and the component silkscreen. The bill of materials provides the components part numbers and details. The silkscreen printout from the layout design provides the component location on the board.

The components are soldered on starting with jumper wires, resistors and working up to ICs and larger components.

External Links