Saron-tava welding, izay fantatra ihany koa amin’ny hoe maska ​​fanakanana solder, dia sosona polymer manify ampiasaina Birao PCB mba hisorohana ny tonon-tsolika tsy hamorona Bridges. Ny maska ​​lasitra koa dia misoroka ny fihanaky ny oxygène ary mihatra amin’ny soritry ny varahina eo amin’ny tabilao PCB.

What is PCB solder resistance type? The PCB welding mask acts as a protective coating on the copper trace line to prevent rust and prevent solder from forming Bridges that lead to short circuits. Misy karazany 4 lehibe ny maska ​​welding PCB – ranoka epoxy, photogramable ranon-javatra, sarimihetsika azo sary an-tsary maina, ary saron-tava ambony sy ambany.

Karazana masira welding efatra

Ny saron-tava lasitra dia miova amin’ny famokarana sy fitaovana. Ny fomba sy ny masom-by izay tokony hampiasaina dia miankina amin’ny fampiharana.

Sarony ambony sy ambany

Saron-tava fantsom-pandrefesana ambony sy ambany no ampiasain’ny injeniera elektronika matetika hamantarana ny fisokafan’ny sosona solder green. Ny sosona dia efa nampidirina resin epoxy na teknolojia sarimihetsika. Ny paingotra singa dia ampidirina amin’ny solaitrabe amin’ny alàlan’ny fanokafana voasoratra anarana amin’ny sarontava.

The conductive trace pattern on the top of the circuit board is called the top trace. Mitovy amin’ny saron-tava an-tampony, ny saron-tava ambany dia ampiasaina amin’ny ilany avadika amin’ny tabilao mihodina.

Sarontava solika ranoka epoxy

Epoxy resins are the cheapest alternative to welding masks. Epoxy is a polymer that is screen printed on a PCB. Ny fanontana lamba dia fanontana fanontana izay mampiasa harato lamba hanohanana lamina fanakanana ranomainty. The grid allows identification of open areas for ink transfer. In the final step of the process, heat curing is used.

Sarontava solitaire solitaire solika

Ny saron-tava photoconductive ranoka, fantatra koa amin’ny hoe LPI, dia tena mifangaro ranon-javatra roa samy hafa. Liquid components are mixed prior to application to ensure a longer shelf life. It is also one of the more economical of the four different PCB solder resistance types.

LPI dia azo ampiasaina amin’ny pirinty amin’ny efijery, sary hosodoko na fampiharana famafazana. The mask is a mixture of different solvents and polymers. Vokatr’izany dia azo alaina manarona manify izay manakaiky ny velaran’ny faritra kendrena. Ity sarontava ity dia natao ho an’ny sarontava amin’ny soldering, fa ny PCB dia tsy mitaky ny firakotra farany vita amin’ny takelaka farany misy ankehitriny.

Mifanohitra amin’ireo inoka epoxy taloha, ny LPI dia mora tohina amin’ny jiro ultraviolet. Mila hosaronan’ny sarontava ny takelaka. Aorian’ny “tsingerin’ny fanasitranana” fohy, ny tabilao dia miharihary amin’ny hazavana ultraviolet amin’ny fampiasana photolithography na laser ultraviolet.

Before applying the mask, the panel should be cleaned and free of oxidization. Izany dia vita amin’ny alàlan’ny vahaolana simika manokana. Izy io koa dia azo atao amin’ny alàlan’ny vahaolana alumina na amin’ny fikosehana ny takelaka amin’ny vato pumice miantona.

One of the most common ways to expose panel surfaces to UV is by using contact printers and film tools. The top and bottom sheets of the film are printed with an emulsion to block the area to be welded. Use the tools on the printer to fix the production panel and film in place. The panels were then simultaneously exposed to an ULTRAVIOLET light source.

Teknika iray hafa no mampiasa lasera hamoronana sary mivantana. But in this technique, no film or tools are needed because the laser is controlled using a reference mark on the panel’s copper template.

Ny sarontava LPI dia hita amin’ny loko isan-karazany, ao anatin’izany ny maitso (matte na semi-gloss), fotsy, manga, mena, mavo, mainty ary maro hafa. Ny indostrian’ny LED sy ny fampiharana laser ao amin’ny indostrian’ny elektronika dia mamporisika ireo mpamokatra sy mpamorona hampivelatra fitaovana fotsy sy mainty matanjaka kokoa.

Saron-tava solika sarimihetsika maina

A dry film photoimagable welding mask is used, and vacuum lamination is used. Ny sarimihetsika maina dia miharihary ary mivoatra. After the film is developed, openings are positioned to produce patterns. Aorian’izany, ny singa dia atsofoka amin’ny pad brazing. Ny varahina avy eo dia voahosotra amin’ny fantsom-pifandraisana amin’ny alalàn’ny fomba elektrokimika.

Ny varahina dia sosona ao anaty loaka sy amin’ny faritra misy azy. Nampiasaina mba hiarovana ny faribolana varahina ny tin. In the final step, the membrane is removed and the etching mark is exposed. Mampiasà hafanana hafanana koa ilay fomba.

Dry film welding masks are commonly used for high-density patch boards. Vokatr’izany dia tsy miraraka amin’ny lavaka famakiana. These are some of the positives of using a dry film welding mask.

Ny fanapaha-kevitra izay maska ​​lasitra hampiasaina dia miankina amin’ny lafin-javatra isan-karazany – ao anatin’izany ny haben’ny vatana amin’ny PCB, ny fampiharana farany hampiasaina, ny lavaka, ny singa ampiasaina, ny conducteur, ny layout ambonimbony, sns.

Ny ankamaroan’ny endrika maoderina PCB dia afaka mahazo sary mihetsika azo soloina azo soloina. Therefore, it is either LPI or dry film resistance film. The surface layout of the board will help you determine your final choice. If the surface topography is not uniform, the LPI mask is preferred. If a dry film is used on uneven terrain, gas may be trapped in the space formed between the film and the surface. Therefore, LPI is more suitable here.

Na izany aza, misy lafy ratsy amin’ny fampiasana LPI. Its comprehensiveness is not uniform. You can also get different finishes on the mask layer, each with its own application. For example, in cases where solder reflow is used, the matte finish will reduce solder balls.

Build solder masks into your design

Ny fananganana sarimihetsika fanoherana solder ho an’ny volavolanao dia ilaina tokoa mba hahazoana antoka fa ny fampiharana sarontava dia amin’ny ambaratonga tsara indrindra. When designing a circuit board, the welding mask should have its own layer in the Gerber file. In general, it is recommended to use a 2mm border around the function in case the mask is not fully centered. Tokony hamela 8mm farafahakeliny koa ianao eo anelanelan’ny pads mba hahazoana antoka fa tsy miforona i Bridges.

Thickness of welding mask

Thickness Welding mask will depend on the thickness of the copper trace on the board. Amin’ny ankapobeny, ny saron-tava miorina 0.5mm dia aleony misaron-tava ireo lalan-kizorana. If you are using liquid masks, you must have different thicknesses for different features. Ny faritra voasarimakirana tsy misy toerana dia mety manana hatevin’ny 0.8-1.2mm, raha toa kosa ireo faritra misy fiasa sarotra toy ny lohalika dia hisy fanitarana manify (eo amin’ny 0.3mm).

famaranana

Raha fintinina, ny famolavolana maska ​​welding dia misy fiatraikany lehibe amin’ny fampiasa fampiharana. Izy io dia mitana andraikitra lehibe amin’ny fisorohana ny harafesina sy ny Bridges welding, izay mety hitarika amin’ny faribolana fohy. Noho izany, ny fanapahan-kevitrao dia mila manisy fiheverana ireo anton-javatra samihafa voalaza ato amin’ity lahatsoratra ity. Manantena aho fa ity lahatsoratra ity dia afaka manampy anao hahatakatra bebe kokoa ny TYPE an’ny sarimihetsika fanoherana PCB. Raha manana fanontaniana ianao, na mila mifandray aminay fotsiny, dia faly manampy anao foana izahay.