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Hoʻouna ʻia: Fepeluali 15, 2022

Māhele:Blogs

Nā huaʻōlelo:pcb, pcbs, pcba, hui pcb, smt, stencil

He aha ka PCB Stencil?

ʻO ka PCB Stencil, i kapa ʻia ʻo Steel mesh, he ʻāpana stai

ʻO ke kila ʻole me nā puka ʻoki laser i hoʻohana ʻia no ka hoʻololi ʻana i ka nui pololei o ka paʻi solder i kahi kūlana i koho ʻia ma kahi PCB ʻole no ka hoʻokomo ʻana i nā ʻāpana mauna.Hoʻokumu ʻia ka stencil me ke kiʻi stencil, uea mesh a me ka pepa kila.Nui nā puka i loko o ka stencil, a ua kūpono nā kūlana o kēia mau puka i nā kūlana e pono e paʻi ʻia ma ka PCB.ʻO ka hana nui o ka stencil ka waiho pololei ʻana i ka nui kūpono o ka solder paste ma nā pads i mea e kūpono ai ka hui solder ma waena o ka pad a me ka mea e pili ana i ka pili uila a me ka ikaika mechanical.

I ka wā e hoʻohana ai, e kau i ka PCB ma lalo o ka stencil, I ka manawa o ka

Hoʻopili pono ʻia ka stencil ma luna o ka papa, kau ʻia ka paʻi solder ma luna o nā puka.

A laila hoʻokuʻu ʻia ka paʻi solder i ka ʻili PCB ma nā lua liʻiliʻi ma ke kūlana paʻa ma ka stencil.Ke hoʻokaʻawale ʻia ka pahu kila mai ka papa, e waiho ʻia ka paʻi solder ma ka ʻili o ka papa kaapuni, mākaukau no ka hoʻokomo ʻana i nā mea mauna ʻili (SMD).ʻO ka liʻiliʻi solder paste i ālai ʻia ma ka stencil, ʻoi aku ka nui o ka waiho ʻana ma ka PCB.Hiki ke hana hou ʻia kēia kaʻina hana, no laila ʻoi aku ka wikiwiki o ke kaʻina SMT a ʻoi aku ka paʻa ʻana a hōʻoia i ke kumukūʻai o ka PCB Assembly.

He aha ka PCB Stencil i hana ʻia?

Hana nui ʻia kahi stencil SMT me ka stencil frame, mesh a

pepa kuhiliʻole, a me ke kāpili.ʻO ke kiʻi stencil maʻamau i hoʻopili ʻia ke kiʻi i hoʻopili ʻia i ka uea mesh me ke kāpili, kahi maʻalahi e kiʻi i ka ʻāʻī ʻana o ke kila kila, ʻo ia ka 35 ~ 48N / cm2.ʻO ka Mesh no ka hoʻopaʻa ʻana i ka ʻili kila a me ke kumu.He ʻelua ʻano o ka mesh, ʻo ke kila kila kila a me ka polymer polyester mesh.Hiki i ka mea mua ke hāʻawi i ka hoʻopaʻa paʻa a lawa akā maʻalahi ke hoʻololi a hemo.ʻO ka hope naʻe hiki ke lōʻihi i ka hoʻohālikelike ʻana i ka uea kuhili ʻole.ʻO ka pepa stencil maʻamau he 301 a i ʻole 304 ʻāpana kila kila e hoʻomaikaʻi maikaʻi i ka hana ʻana o ka stencil ma o kāna mau waiwai mechanical maikaʻi loa.

Hana Hana ʻana o Stencil

ʻEhiku ʻano o nā stencils a ʻekolu mau ala no ka hana ʻana i nā stencils: chemical etching, laser cutting and electroforming.ʻO ka mea maʻamau ka stencil kila laser.ʻO Las

ʻO ka stencil ka mea maʻamau i hoʻohana ʻia i ka ʻoihana SMT, kahi i hōʻike ʻia:

Hoʻohana pololei ʻia ka faila data e hōʻemi i ka hewa hana;

ʻO ka pololei o ka wehe ʻana o ka stencil SMT he kiʻekiʻe loa: ʻo ka hewa holoʻokoʻa holoʻokoʻa ʻo ≤± 4 μm;

ʻO ka wehe ʻana o ka stencil SMT he geometry, ʻo ia ka conduci

i ka paʻi ʻana a me ka hana ʻana i ka paʻi solder.

Ke kahe kaʻina o ka ʻoki ʻana i ka laser: hana kiʻiʻoniʻoni PCB, lawe i nā hoʻonohonoho, faila data, hoʻoili ʻikepili, ʻokiʻoki laser, wili.ʻO ke kaʻina hana me ka pololei o ka hana ʻikepili kiʻekiʻe a me ka liʻiliʻi o ka hopena o nā kumu pahuhopu;ʻO ka wehe ʻana o Trapezoidal e kūpono i ka demoulding, hiki ke hoʻohana ʻia no ka ʻoki pololei ʻana, ke kumukūʻai kumukūʻai.

Nā koi a me nā loina o ka PCB Stencil

1. No ka loaʻa ʻana o kahi paʻi kūpono o ka solder paste ma nā papa PCB, ʻo ke kūlana kikoʻī a me nā kikoʻī e hōʻoia i ka pololei o ka wehe ʻana, a ʻo ka wehe ʻana e like me ke ʻano wehe i kuhikuhi ʻia i nā hōʻailona fiducial.

2. No ka pale ʻana i nā hemahema solder e like me ka bridging a me solder beads, e hoʻolālā ʻia ka wehe kūʻokoʻa ma mua o ka nui o ka PCB pad.ʻaʻole ʻoi aku ka nui o ka laulā ma mua o 2mm.ʻOi aku ka nui o ka ʻāpana o ka pā PCB ma mua o ʻelua hapakolu o ka ʻāpana o loko o ka paia puka o ka stencil.

3. I ka hohola ana i ka mesh, e hoomalu pono ia, a pa

y ka nānā nui ʻana i ka laulā wehe, pono e hoʻokaʻawale a waena.

4. Me ka ʻili o ka paʻi ʻana ma luna, ʻo ka wehe haʻahaʻa o ka mesh he 0.01mm a i ʻole 0.02mm ākea ma mua o ka wehe ʻana o luna, ʻo ia hoʻi, e hoʻohuli ʻia ka wehe ʻana i conical e hoʻomaʻamaʻa i ka hoʻokuʻu pono ʻana o ka solder paste a hoʻemi i ka hoʻomaʻemaʻe. manawa o ka stencil.

5. Pono e maʻalahi ka pā mesh.Maikaʻi no QFP a me CSP me ka spacing ma lalo o 0.5mm, pono ka mea hoʻolako e hana i ka electropolishing i ka wā hana.

6. ʻO ka mea maʻamau, ʻo ka wehewehe ʻana o ka stencil wehe a me ke ʻano o nā ʻāpana SMT e kūlike me ka pad, a ʻo ka lākiō wehe ʻo 1: 1.

7. ʻO ka mānoanoa kūpono o ka pepa stencil e hōʻoia i ka hoʻokuʻu

o ka nui makemake o ka solder paste ma o ka puka.Hiki i ka ho'opa'a solder keu ke kumu o ka ho'opa'a 'ana i ka solder a 'o ka emi 'ana o ka solder e ho'onāwaliwali i nā hono solder.

Pehea e hoʻolālā ai i kahi Stencil PCB?

1. Manaʻo ʻia ʻo 0805 e ʻoki i nā pad ʻelua o ka wehe ʻana i ka 1.0mm, a laila e hana i ka pōʻai concave B = 2 / 5Y;A = 0.25mm a i ʻole he = 2 / 5 * l anti tin bead.

2. Chip 1206 a ma luna aʻe: ma hope o ka hoʻoneʻe ʻia ʻana o nā pad ʻelua i waho e 0.1mm pakahi, e hana i ka pōʻai concave i loko B = 2 / 5Y;A = 2 / 5 * l ka lāʻau anti tin bead.

3. No ka PCB me BGA, o ka wehe ana o ka stencil me ka poepoe spacing oi aku mamua o 1.0mm he 1:1, a o ka wehe ana o ka stencil me ka poepoe spacing o emi malalo o 0.5mm he 1:0.95.

4. No nā QFP a me SOP me ka pitch 0.5mm, ka lati wehe

o i ka huina laula kuhikuhi he 1:0.8.

5. ʻO ka lākiō wehe ma ka ʻaoʻao lōʻihi he 1: 1.1, me ka 0.4mm pitch QFP, ʻo ka wehe ʻana i ka huina ākea ākea he 1:0.8, ʻo ka wehe ʻana i ka ʻaoʻao lōʻihi he 1:1.1, a me ka wāwae pōʻai waho.ʻO ka radius Chamfer r = 0.12mm.ʻO ka nui o ka laulā wehe o ka mea SOP me ka pitch 0.65mm e hoʻemi ʻia e 10%.

6. I ka PLCC32 a me ka PLCC44 o na huahana ma'amau i perforated, 'o ka huina o ka laula kuhikuhi he 1:1 a me ka loa alahele 1:1.1.

7. No nā mea hoʻopili SOT maʻamau, ka lākiō wehe

ʻO ka hopena o ka papa nui he 1:1.1, ʻo ka ʻaoʻao ākea āpau o ka hopena papa liʻiliʻi he 1:1, a ʻo ka ʻaoʻao lōʻihi he 1:1.

Peheae hoʻohana i ka PCB Stencil?

1. E mālama me ka mālama.

2. E hoʻomaʻemaʻe ʻia ka stencil ma mua o ka hoʻohana ʻana.

3. E hoʻopili like ʻia ka paʻi solder a i ʻole ke kāpili ʻulaʻula.

4. E hoʻololi i ke kaomi paʻi i ka maikaʻi loa.

5. No ka hoʻohana ʻana i ka paʻi pepa.

6. Ma hope o ka hahau ʻana, ʻoi aku ka maikaʻi o ka hoʻomaha no 2 ~ 3 kekona ma mua o ka demoulding, a hoʻonohonoho i ka wikiwiki demoulding ʻaʻole wikiwiki loa.

7. E hoʻomaʻemaʻe ʻia ka Stencil i ka manawa, mālama maikaʻi ʻia ma hope o ka hoʻohana ʻana.

Hana Hana Stencil o PCB ShinTech

Hāʻawi ʻo PCB ShinTech i nā lawelawe hana hana stencils stainless steel.Hana mākou i nā stencils me ka mānoanoa o 100 μm, 120 μm, 130μm, 150 μm, 180 μm, 200 μm, 250 μm a me 300 μm.Pono ka waihona ʻikepili e hana ai i ka stencil laser e loaʻa i ka SMT solder paste layer, fiducial mark data, PCB outline layer and character layer, no laila hiki iā mākou ke nānā i nā ʻaoʻao mua a i hope o ka ʻikepili, ka māhele ʻāpana, etc.

Inā makemake ʻoe i kahi ʻōlelo, e hoʻouna i kāu mau faila a nīnau iāsales@pcbshintech.com.