Fa'afefea ona Filifili Lau Fa'auma mo lau PCB Design
Ⅱ Iloiloga ma Faatusatusaga
Fa'asalalau: Nov 16, 2022
Vaega: Blogs
Fa'ailoga: pcb,pcba,potopotoga pcb,pcb gaosiga, pcb luga fa'auma
E tele fa'amatalaga e uiga i le fa'auma o luga, e pei ole HASL e leai se ta'ita'i e iai le fa'afitauli e maua ai le mafolafola faifai pea.O le Electrolytic Ni/Au e matua taugata lava ma afai e tele naua auro e teuina i luga o le papa, e mafai ona oʻo atu i soʻo faʻamau.Faatofu apa ua solderability degradation ina ua uma ona aafia i le tele o taamilosaga vevela, e pei o le pito i luga ma le pito i lalo PCBA reflow faagasologa, ma isi.O le laulau o lo'o i lalo o lo'o fa'aalia ai se su'esu'ega fa'apitoa mo fa'au'uga fa'apipi'i masani o laupapa fa'asalalau lolomi.
Table1 Fa'amatalaga puupuu o le gaosiga o gaosiga, tulaga lelei ma le le lelei, ma fa'aoga masani o ta'uta'ua ta'uta'ua fa'amae'aina luga ole PCB
| PCB Laugata Maea | Fa'agasologa | mafiafia | Tulaga lelei | Fa'aletonu | Talosaga masani |
| HASL leai se ta'ita'i | O laupapa PCB e faatofuina i totonu o se ta'ele apa u'amea ona feulaina lea e naifi ea vevela mo pati mafolafola ma le tele o solder aveese. | 30µin(1µm) -1500µin(40µm) | Lelei Solderability;Tele avanoa;E mafai ona toe faʻaleleia / toe faʻaleleia;Uumi fata umi | Laufanua e le tutusa;Te'i vevela;Le lelei le susu;Alalaupapa solder;PTH fa'apipi'i. | Fa'aaoga lautele;E fetaui mo pads tetele ma le va;Le fetaui mo HDI ma <20 mil (0.5mm) le lelei pitch ma BGA;Le lelei mo PTH;Le fetaui mo PCB apamemea mafiafia;E masani lava, fa'aoga: Fa'atonu laupapa mo su'ega eletise, fa'amauina lima, nisi mea fa'aeletonika maualuga fa'atino e pei ole va'alele ma masini a le militeri. |
| OSP | Fa'aaogā fa'ama'i se mea fa'aola i luga o laupapa e fai ai se u'amea fa'aola e puipuia ai le 'apamemea fa'aalia mai le 'ele. | 46µin (1.15µm)-52µin(1.3µm) | Tau maualalo;Pads e toniga ma mafolafola;Lelei solderability;E mafai ona tu'ufa'atasi ma isi fa'auma;E faigofie le faiga;E mafai ona toe galue (i totonu o le faleaoga). | Ma'ale'ale ile taulimaina;Puupuu le ola fa'asa.Fa'atapula'a solder sosolo;Fa'aleagaina le solderability ma le maualuga o le vevela & taamilosaga;Nonconductive;Faigata ona asiasia, su'esu'e ICT, ionic & press-fit atugaluga | Fa'aaoga lautele;E fetaui lelei mo SMT / lelei pitches / BGA / vaega laiti;Auauna laupapa;Le lelei mo PTH;E le fetaui mo tekinolosi crimping |
| ENIG | O se fa'agasologa o vaila'au e fa'apipi'i ai le kopa fa'aalia i le Nikeli ma le Auro, o lea e aofia ai se vaega fa'alua o le fa'alavalava fa'ameamea. | 2µin (0.05µm)– 5µin (0.125µm) o Auro i luga atu o le 120µin (3µm)– 240µin (6µm) o Nikeli | Solderability lelei;Pads e laugatasi ma toniga;Al uaea fe'avea'i;Laiti fa'afeso'ota'i tetee;Fa'aumi umi;Lelei le pala ma le tumau | popolega "Black Pad";Fa'ailo gau mo fa'ailoga fa'amaoni talosaga;le mafai ona toe galue | Lelei mo le Fa'apotopotoga o le fa'apipi'i lelei ma le fa'apipi'iina o luga o le mauga (BGA, QFP...);Lelei mo le tele o ituaiga Soldering;E sili atu mo le PTH, lolomi fetaui;Uaea Bondable;Fautuaina mo le PCB ma le maualuga le faʻatuatuaina talosaga e pei o le aerospace, militeli, fomaʻi ma tagata faʻatau maualuga, ma isi;E le fautuaina mo Touch Contact Pads. |
| Electrolytic Ni/Au (Auro vaivai) | 99.99% mama - 24 carat Auro faʻaaogaina i luga o le nickel layer e ala i se faiga eletise aʻo leʻi faia le soldermask. | 99.99% Auro mama, 24 Karat 30µin (0.8µm) -50µin (1.3µm) i luga ole 100µin (2.5µm) -200µin (5µm) o Nickel | Malo ma'a'a ma le tumau;Tele conductivity;Mafolafola;Al uaea fe'avea'i;Laiti fa'afeso'ota'i tetee;E umi le ola | Taugata;Au embrittlement pe afai mafiafia tele;Fa'atonuga fa'alavelave;Fa'aopoopo galuega/faigaluega malosi;E le fetaui mo le soiina;O le ufiufi e le tutusa | E masani ona faʻaaogaina i le uaea (Al & Au) faʻapipiʻi i totonu o pusa atigipusa e pei ole COB (Chip on Board) |
| Electrolytic Ni/Au (Auro malo) | 98% mama – 23 carat Auro fa'atasi ma fa'ama'a'a fa'aopoopo i le ta'ele fa'apipi'i fa'aoga i luga o le nickel layer e ala i se faiga fa'aeletise. | 98% auro mama, 23 Karat30μin(0.8μm) -50μin(1.3μm) i luga ole 100μin(2.5μm) -150μin(4μm) o Nickel | Solderability lelei;Pads e laugatasi ma toniga;Al uaea fe'avea'i;Laiti fa'afeso'ota'i tetee;Toe fai | Fa'aleaga (taulimaina & teuina) a'a ile si'osi'omaga maualuga o le sulfur;Fa'aitiitiga filifili filifili sapalai e lagolago ai lenei fa'ai'uga;Fa'amalama pu'upu'u fa'aogaina i le va o fa'apotopotoga. | E masani ona faʻaaogaina mo fesoʻotaʻiga eletise e pei o fesoʻotaʻiga pito (tamailima auro), laupapa vaʻavaʻa IC (PBGA/FCBGA/FCCSP...), Keyboards, fesoʻotaʻiga maa ma nisi pads suʻega, ma isi. |
| Faatofu Ag | o se mea siliva e teuina i luga o le 'apamemea e ala i se faiga faʻapipiʻi eletise pe a uma le etch ae aʻo leʻi faia le soldermask | 5µin(0.12µm) -20µin(0.5µm) | Solderability lelei;Pads e laugatasi ma toniga;Al uaea fe'avea'i;Laiti fa'afeso'ota'i tetee;Toe fai | Fa'aleaga (taulimaina & teuina) a'a ile si'osi'omaga maualuga o le sulfur;Fa'aitiitiga filifili filifili sapalai e lagolago ai lenei fa'ai'uga;Fa'amalama pu'upu'u fa'aogaina i le va o fa'apotopotoga. | Su'ega tau tamaoaiga i le ENIG mo Fine Traces ma BGA;Lelei mo le faʻaogaina o faailoilo maualuga;Lelei mo suiga o le membrane, puipui EMI, ma faʻapipiʻi uaea alumini;E talafeagai mo lomitusi fetaui. |
| Faatofu Sn | I totonu o se ta'ele kemikolo e leai se eletise, o se vaega manifinifi pa'epa'e o Tin e teu sa'o i luga o le 'apamemea o laupapa fa'asalalau e fai ma pa mo le aloese mai le fa'ama'iina. | 25µin (0.7µm)-60µin(1.5µm) | E sili ona lelei mo tekinolosi fetaui lelei;Tau-lelei;Planar;Lelei solderability (pe a fou) ma faatuatuaina;Mafolafola | Fa'aleagaina le solderability fa'atasi ai ma le maualuga o le taimi & ta'amilosaga;E mafai ona pala;Taulimaina o mataupu;Tin Wiskering;Le fetaui mo PTH;O loʻo i ai Thiourea, o se Carcinogen lauiloa. | Fautuaina mo gaosiga tetele;Lelei mo le tuʻuina o SMD, BGA;Lelei mo lomitusi fetaui ma vaalele tua;E le fautuaina mo le PTH, fa'afeso'ota'i ki, ma le fa'aogaina i matapulepule peelable |
Table2 O se iloiloga o meatotino masani o le PCB Fa'aonaponei Fa'auma Fa'auma ile gaosiga ma le fa'aogaina
| Gaosiga o fa'auma fa'aoga masani | |||||||||
| Meatotino | ENIG | ENEPIG | Auro vaivai | Auro malo | IAg | ISn | HASL | HASL-LF | OSP |
| Ta'uta'ua | Maualuga | Maulalo | Maulalo | Maulalo | Alafua | Maulalo | Maulalo | Maualuga | Alafua |
| Tau o Fa'agasologa | Maualuluga (1.3x) | Maualuluga (2.5x) | Maualuga (3.5x) | Maualuga (3.5x) | Ala (1.1x) | Ala (1.1x) | Maulalo (1.0x) | Maulalo (1.0x) | Maulalo (0.8x) |
| Teugatupe | Faatofu | Faatofu | Electrolytic | Electrolytic | Faatofu | Faatofu | Faatofu | Faatofu | Faatofu |
| Ola Fa'asa | Umi | Umi | Umi | Umi | Alafua | Alafua | Umi | Umi | Puupuu |
| RoHS tausisia | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | No | Ioe | Ioe |
| Laufanua Fa'atasi mo SMT | Lelei | Lelei | Lelei | Lelei | Lelei | Lelei | Mativa | Lelei | Lelei |
| Kopa Fa'aalia | No | No | No | Ioe | No | No | No | No | Ioe |
| Taulimaina | masani | masani | masani | masani | Mata'utia | Mata'utia | masani | masani | Mata'utia |
| Taumafaiga Fa'agasologa | Alafua | Alafua | Maualuga | Maualuga | Alafua | Alafua | Alafua | Alafua | Maulalo |
| Mafai toe galue | No | No | No | No | Ioe | E le fautuaina | Ioe | Ioe | Ioe |
| Taamilosaga vevela Manaomia | tele | tele | tele | tele | tele | 2-3 | tele | tele | 2 |
| Matā'upu musumusu | No | No | No | No | No | Ioe | No | No | No |
| Te'i vevela (PCB MFG) | Maulalo | Maulalo | Maulalo | Maulalo | Maualalo tele | Maualalo tele | Maualuga | Maualuga | Maualalo tele |
| Maualalo Tetee / Saosaoa maualuga | No | No | No | No | Ioe | No | No | No | N/A |
| Fa'aoga o fa'auma fa'aoga masani | |||||||||
| Talosaga | ENIG | ENEPIG | Auro vaivai | Auro Malosi | IAg | ISn | HASL | LF-HASL | OSP |
| Malosi | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe |
| Fa'afoliga | Faatapulaaina | Faatapulaaina | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe |
| Flex-Ma'a'a | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Le Fiafia |
| Lelei Lelei | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Le Fiafia | Le Fiafia | Ioe |
| BGA & μBGA | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Le Fiafia | Le Fiafia | Ioe |
| Solderability Tele | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | Faatapulaaina |
| Su'e Chip | Ioe | Ioe | Ioe | Ioe | Ioe | Ioe | No | No | Ioe |
| Press Fit | Faatapulaaina | Faatapulaaina | Faatapulaaina | Faatapulaaina | Ioe | Lelei | Ioe | Ioe | Faatapulaaina |
| Uo-Pu | Ioe | Ioe | Ioe | Ioe | Ioe | No | No | No | No |
| Fa'amauina uaea | Ioe (Al) | Ioe (Al, Au) | Ioe (Al, Au) | Ioe (Al) | Fesuia'i (Al) | No | No | No | Ioe (Al) |
| Solder Susū | Lelei | Lelei | Lelei | Lelei | Lelei tele | Lelei | Mativa | Mativa | Lelei |
| Solder Soofaatasi Amiotonu | Lelei | Lelei | Mativa | Mativa | Lelei | Lelei | Lelei | Lelei | Lelei |
Ole ola fa'aola ose elemene taua e tatau ona e mafaufau i ai pe a fai au fa'asologa o gaosiga.Ola Fa'asao le faʻamalama galue lea e tuʻuina atu ai le faʻamaeʻaina e maua ai le atoatoa PCB weldability.E taua tele le faʻamautinoa o loʻo faʻapipiʻi uma au PCB i totonu o le fata ola.E fa'aopoopo i meafaitino ma fa'agaioiga e fa'auma ai le fa'auma, e matua'i a'afia le ola fa'aumae PCBs afifiina ma teuina.O le tagata talosaga sa'o mo le teuina o auala o lo'o fautuaina mai e le IPC-1601 ta'iala o le a fa'atumauina le fa'auma ma fa'amaoni.
Table3 Fa'atusatusaga o le ola i le va'aiga lauiloa i luga ole PCB
|
| OLA SHEL masani | Fautuaina le Ola Fa'asa | Avanoa Toe Fai |
| HASL-LF | 12 masina | 12 masina | IOE |
| OSP | 3 masina | 1 masina | IOE |
| ENIG | 12 masina | 6 masina | LEAI* |
| ENEPIG | 6 masina | 6 masina | LEAI* |
| Electrolytic Ni/Au | 12 masina | 12 masina | NO |
| IAg | 6 masina | 3 masina | IOE |
| ISn | 6 masina | 3 masina | IOE** |
* Mo le ENIG ma le ENEPIG e faʻamaeʻaina se taamilosaga toe faʻafouina e faʻaleleia atili ai le susu ma o loʻo avanoa.
** E le o fautuaina le toe fa'aogaina o le apa vaila'au.
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Taimi meli: Nov-16-2022
