<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">Dobry den,</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">po hledani na internetu jsem zjistil jak to je. Existuji dva hlavni typy solder mask:</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">1. Aqueous developable photo-imagable solder mask</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">2. UV curable
solder mask</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">Typ 1.</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">Nanese se na DPS, vytvrzuje se teplotou v troube a potom se pres folii se vzorem osviti UV svetlem.</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">Typ
2.</div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;">nanese se na DPS a pres folii se vzorem se vytvrdi UV svetlem. Na internetu jsem nasel m<span style="background-color: transparent;">anual k nejake UV curable solder mask a v nem se pise:</span></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><span style="background-color: transparent;"><br></span></div><div style="background-color: transparent;"><span style="background-color: transparent;"><div style="background-color: transparent;">CURING</div><div style="background-color: transparent;">Using UV dryers equipped with 3 x 200 watts per inch metal halide or mercury vapour lamps, ink printed with</div><div style="background-color: transparent;">polyester 100-40 per cm, curing
is achieved at about 4.5 to 5 metres per min. or the energy required to cure is</div><div style="background-color: transparent;">about 1800 millijoules using UV Integrator Model UV or about 3200 – 3500 millijoules on UVA spectral</div><div style="background-color: transparent;">response.</div><div style="background-color: transparent;">In case of over-printing on UV Solder Resists, it is advisable to under cure the solder resists (7-8m) or about 1200</div><div style="background-color: transparent;">millijoules to get better inter-coat adhesion. The complete curing of Solder Resist will take place at the same time</div><div style="background-color: transparent;">when curing the marking ink. Avoid over-curing that could make the ink film brittle.</div></span></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><span style="background-color:
transparent;"><br></span></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><span style="background-color: transparent;">Radovan Augustin</span><br></div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 16px; color: rgb(0, 0, 0); background-color: transparent; font-style: normal;"><br></div><div style="background-color: transparent;"><div style="background-color: transparent;"><br></div></div> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span
style="font-weight:bold;">From:</span></b> Petr Labaj <labaj@volny.cz><br> <b><span style="font-weight: bold;">To:</span></b> HW-news <hw-list@list.hw.cz> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, April 23, 2013 2:09 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: Nepajiva maska - zkusenosti<br> </font> </div> <div class="y_msg_container"><br>Moc to nevidim jako funkcni. Ale treba jen ten Vas postup spatne chapu.<br><br>Pokud byste to chtel zarovnat skrabkou posle tech nalepenych "kolejnic",<br>tak byste musel mit absolutne v rovine povrch toho tistaku. Takze snad tehdy,<br>pokud byste treba pouzil vakuovy pritlak. Jen u jen volne polozeneho tistaku<br>bude urcite povrch trochu prohnuty (hrajeme si na mikrony).<br><br>A jak na to budete exponovat motiv? To, co popisujete, by mohlo fungovat<br>pri LDI (prime kresleni motivu laserem). Ale pokud pouzijete beznou expozici<br>pres sablonu, tak na to tu
sablonu musite nejak polozit. No a kdyz uz ji tam<br>budete pokladat, tak Vam tu vrstvu masky muze srovnat ona (tak to pouzivam<br>ja, a zrejme i mnoho ostatnich).<br><br>O jake mesce uvazujete? Pokud o tech v "kyblicich" 100g, co na ni tady sly<br>odkazy (modra, zelena, cerna, bila) a od ktere kazdeho zrazuji, tak na tu<br>teplota nijak neucinkuje. Ona se nevytvrdi, spis naopak je jeste tekutejsi.<br>A pokud by to byla ona, tak na osvit 10 minut nejakym svetlem na nehty zrejme<br>muzete zapomenout, potrebuje to chce mnohem vetsi davku (tedy ja tvrdim, ze<br>nejlepe davku z Kalasnikova, ale nechci byt nekonstruktivni). U toho svetla<br>na nehty by to chtelo zjistit spektrum, delsi vlny (kolem 400nm) funguji jeste<br>hur nez kratsi (kolem 365nm), a to i ty kratke trvaji u teto pasty dlouho.<br><br>PL<br><br>************************************<br><br>From: Radovan Augustin <br>To: hw-list <br>Sent: Tuesday, April 23, 2013 9:14 AM<br>Subject: RE: Nepajiva
maska - zkusenosti<br><br>Dobry den,<br>nepajiva maska modre barvy odrazi modrou barvu, proto je modra, ucinnost UV svetla bude asi velmi slaba.<br><br>Mam vymyslenej tenhle postup, ktery se chystam v nejblizsi dobe vyzkouset:<br><br>Pri vyrobe CU motivu na DPS se necha na dvou stranach pas CU siroky asi 1cm. Po dokonceni DPS se odstrihne.<br>Na tenhle pas na kraji DPS se nalepi CU pasek, napr. <a href="http://www.gme.cz/vodive-pasky/cu-paska-dps-p661-096/" target="_blank">http://www.gme.cz/vodive-pasky/cu-paska-dps-p661-096/</a><br>CU pasek od Elchemca prodavany v GME ma tloustku s lepidlem 70um.<br><br>Potom se nepajiva maska nanese obycejnou sterkou, napr.<br><a href="http://www.domacitechnika.cz/levne-jobi-sterka-japan-4ks-nerez-sterka-japan-4ks-nerezCU" target="_blank">http://www.domacitechnika.cz/levne-jobi-sterka-japan-4ks-nerez-sterka-japan-4ks-nerezCU </a>pasek po stranach DPS zapezpeci tloustku nanesene nepajive masky asi 70um nad medi. Deska
s nanesenou pastou se da do pece na 15 minut pri teplote 90 stupnu.Potom se osviti UV svetlem asi deset minut. Mohou se pouzit UV zarivky z profesionalni UV lampy, napr.http://aukro.cz/profesjonalni-uv-lampa-36w-na-vytvrzovani-gelu-b-i3172489173.htmlNepajiva maska je UV curable, to znamena ze po osvitu se redidlem smyje nepajiva maska ktera nebyla osvicena UV svetlem.Radovan Augustin<br><br>_______________________________________________<br>HW-list mailing list - sponsored by www.HW.cz<br><a ymailto="mailto:Hw-list@list.hw.cz" href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</a><br><a href="http://list.hw.cz/mailman/listinfo/hw-list" target="_blank">http://list.hw.cz/mailman/listinfo/hw-list</a><br><br></div> </div> </div> </div></body></html>