He aha PCB windowing

The wires on the PCB are covered with oil, which can prevent short circuit and damage to the device. The so-called window is to remove the paint layer on the wire, so that the wire can be exposed to tin.

How to design PCB window opening  PCB design how to set wiring window opening

E like me kāu e ʻike ai i ke kiʻi ma luna, ma ka puka aniani. PCB window opening is not uncommon, and the most common one is probably the memory module. Those of you who have disassembled a computer know that the memory module has one gold finger, as shown in the picture below:

How to design PCB window opening PCB design how to set wiring window opening

ʻO ka manamana gula maʻaneʻi e wehe i ka puka aniani, kuʻi a pāʻani.

ʻO ka wehe ʻana o ka puka aniani kekahi hana maʻamau loa, ʻo ia hoʻi, ʻo ka hoʻoheheʻe ʻana i ka tin i hoʻonui i ka mānoanoa o ka pepa keleawe i ka wā ma hope, kahi maʻalahi no ka nui o ke au, ka mea maʻamau i ka papa mana a me ka papa hoʻokele kaʻa.

E wehe iā Windows a me ke keleawe huali i ka hoʻolālā PCB

I ka hoʻolālā, hālāwai pinepine mākou i nā koi a nā mea kūʻai aku no ka wehe ʻana iā Windows a me ka hoʻonaninani ʻana i ke keleawe, akā paʻakikī e kamaʻilio pū me lākou no ka mea liʻiliʻi ka ʻike o ka poʻe kūʻai aku a ʻaʻole maopopo ʻole mākou e pili ana i kēia kaʻina. I kā mākou hoʻolālā, e hālāwai pinepine me nā mea kūʻai aku e pono e hoʻohui i ka uhi pale, pā kihi kūloko keleawe keleawe, ma o ka lua hāmama ke kūpale kuʻihao, IC wela poho hoʻi hōʻike keleawe keleawe, ʻaihue pale pale a pēlā aku. Wahi a ke kūlana maoli, e nānā i kekahi mau kiʻi e wehewehe.

1. Uhi pale

Inā pono ka mea kūʻai aku e hoʻohui i ka uhi pale, ʻo ka mea a mākou e pono ai e hoʻopili i ka soldmask me ka laulā ma ka liʻiliʻi o 1mm. Pono mākou e hōʻoia me ka mea kūʻai aku inā pono mākou e hoʻohui i ka hei kila. Ke hoʻohui nei iā Soldmask, pono mākou e kau i ka ʻili keleawe o ka pūnaewele honua i kahi o ka hoʻohui ʻana iā Soldmask. Pono e uhi ʻia ka mokulele Soldmask, a i ʻole e hōʻike ʻia ka substrate (FR4, a pēlā aku.). Other non – terrestrial networks should not cross the Soldmask. Add the Soldmask area to the PCB effect to reveal the yellow copper. E uhi ʻia nā wahi i hoʻohui ʻole ʻia e ka pale solder.

Pehea e hoʻolālā ai i ka puka aniani PCB _PCB hoʻolālā pehea e hoʻonohonoho ai i ka wehe o ka puka aniani

2, puka puka kuʻihao

I ka hoʻolālā, lohe pinepine mākou i ka puka kuʻina papa āpau a i ʻole ka puka kuʻina kūloko, ke hoʻohui nei mākou i nā puka, nānā mākou i ka inoa o ka hui puka puka i hoʻopihapiha ʻia ʻo BGA, ma ka ʻaoʻao ʻē aʻe, ʻaʻohe BGA i hoʻopaʻa ʻia i puka puka puka (ʻo kā mākou hui ho’ākāka). General company specifications exceed 12mil holes must be welded window holes.

Pehea e hoʻolālā ai i ka puka aniani PCB _PCB hoʻolālā pehea e hoʻonohonoho ai i ka wehe o ka puka aniani

3, IC heat dissipation pad

Ma ke ʻano laulā, ma ke kua o ka pā hoʻoneʻe wela o IC e hoʻohui i ka puka aniani (hoʻohui i ka backmasmas i ʻoi aku ka nui ma mua o ka pale o ka ʻilikai) a me ka puka, a ma ke kua o ka uhi uhi keleawe, i mea e hoʻokau pono ai i ka wela o ka honua i ʻo ka lua i ka hope o ka ʻāpana keleawe i ʻoi aku ka maikaʻi i waho.

Pehea e hoʻolālā ai i ka puka aniani PCB _PCB hoʻolālā pehea e hoʻonohonoho ai i ka wehe o ka puka aniani

4. ʻAihue i nā pads tin

In wave soldering, in order to solve the problem of connecting tin caused by the close spacing of pads, we will use tadpole shape of stolen tin pads. Notice the copper skin with the same size as the solder should be added.

Pehea e hoʻolālā ai i ka puka aniani PCB _PCB hoʻolālā pehea e hoʻonohonoho ai i ka wehe o ka puka aniani

Pehea e hoʻomaopopo ai i ka piula ma ka puka aniani PCB

Pono ke kaapuni e kipaku i ka relay 8-channel, ke pani ʻia ka relay multi-channel ke piʻi ka piʻi o kēia manawa, i mea e hōʻoia ai i ka hopena maoli, i ka hoʻonui ʻana i ka laina o kēia manawa i ka manawa like, manaʻo ʻia e hemo i ke kūpaʻa paʻa. papa o ka laina o kēia manawa – ka aila ʻōmaʻomaʻo ʻōmaʻomaʻo, ma hope o ka hana ʻia ʻana o ka papa, hiki iā ʻoe ke hoʻohui i ke kēpau i luna, e mānoanoa ana i ka laina, hiki ke hala aʻe i kēia au.

ʻO nā hopena maoli penei:

Pehea e hoʻolālā ai i ka puka aniani PCB _PCB hoʻolālā pehea e hoʻonohonoho ai i ka wehe o ka puka aniani

Penei ke ʻano hana:

E kaha wale i ka laina ma ka ToPlayer (a i ʻole ka LayLayer e hilinaʻi ana i ka papa hea ka laina preset i loko) a laila kahakaha i ka laina i kūlike me ia i ka papa Topsolder (a i ʻole ka solder lalo).

Hoʻolālā PCB pehea e hoʻonohonoho ai i ka puka aniani

Hiki i ka hoʻolālā CB ke hoʻonohonoho i nā uea uila ma TOP / BOTTOM SOLDER papa.

TOP / BOTTOM SOLDER aila ʻōmaʻomaʻo ʻōmaʻomaʻo: Coat ka TOP / BOTTOM ʻāpana me SOLDER ʻōmaʻomaʻo ʻōmaʻomaʻo e pale aku ai i ka tin mai ka uhi ʻana i ka pepa keleawe a mālama i ka uhi.

Hiki ke hoʻonohonoho ʻia ka pale aniani ʻōmaʻomaʻo ʻōmaʻomaʻo ma ka pad, ma o ka uwea a me nā uila ʻole uila o kēia papa.

1. By default, the pad will open a window in PCB design (OVERRIDE: 0.1016mm), that is, the pad exposes copper foil, expands 0.1016mm, and tin will be added during wave soldering. ʻAʻole pono e hoʻololi i kahi hoʻolālā e hōʻoia i ka weldability;

2. Ma ka paʻamau, e wehe ka puka i ka puka aniani ma ka hoʻolālā PCB (OVERRIDE: 0.1016mm), ʻo ia hoʻi, e hōʻike ka lua i ka pepa keleawe, hoʻonui i ka 0.1016mm, a e hoʻohui ʻia ka tin i ka soldering nalu. Inā pale ka hoʻolālā i ka hiki ʻole ʻana o ka tin ma ka lua a me ke keleawe, pono ʻoe e hōʻoia i ke koho PENTING i loko o ka hiʻona hou o ka lua ma SOLDER MASK e pani i ka lua.

3, i ka hoʻohui, hiki i kēia papa ke kaʻawale me ka uila ʻole ʻole, ka pale pale ʻaila ʻōmaʻomaʻo e wehe ana i ka puka aniani. Inā aia ia ma ka uea hao keleawe, hoʻohana ʻia ia e hoʻomaikaʻi i ka hiki i kēia wā o ka uea, a hoʻohui ʻia ka hana ʻana o ke kēpau ke hoʻohui ʻia; Inā aia ia ma ka uea keleawe ʻole keleawe, hoʻolālā ʻia ia no ka lōkō a me ka paʻi ʻana i ke ʻano pilikino kūikawā, a hiki ke haʻalele ʻia ka papa paʻi paʻi ʻano.