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Home > Multilayer PCB > Smart Energy Meter PCB Manufacturer

Smart Energy Meter PCB Manufacturer

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FR4PCB is a pro three-phase energy meter PCB manufacturer, specializing in 4-layer HASL PCBs for industrial meters. We offer high EMC performance, strong current-carrying capacity, and excellent environmental adaptability. Our solutions ensure high yield, rapid delivery, and cost savings, with 2025 tech upgrades for blockchain integration and AI-enhanced fault prediction.
Layers: 4
Base material: FR4 
Cu foil finish (outter layers): 35 um 
Cu foil finish (inner layers): 35 um
Board thickness: 1.6 mm
Plated mechanical holes - PTH: NO
Solder mask: blue
Silkscreen: white
Surface finish: HASL
Outline dimension: 185.5 x 170 mm

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  • Smart Energy Meter PCB Manufacturer
  • Description

Professional Three-Phase Energy Meter PCB Manufacturer: Industrial-Grade Solutions with 4-Layer HASL Process

FR4PCB, as a PCB manufacturer deeply rooted in the energy metering field, specializes in the R&D and mass production of three-phase smart meter circuit boards. We adopt a cost-effective 4-layer Hot Air Solder Leveling (HASL) process to meet the stringent demands for reliability, cost, and compliance in global industrial-grade energy meters.

I. Core Technical Advantages of 4-Layer HASL PCBs

High-Reliability Stack-Up Design

  • Layer Structure: L1 Signal Layer → L2 Ground Layer → L3 Power Layer → L4 Signal Layer (TG130 FR-4 substrate), optimizing EMC performance.
  • HASL Process: Tin layer thickness ≥3μm, strong soldering compatibility, with costs 40% lower than immersion gold processes.

High Current-Carrying Capacity

  • 1Oz Thick Copper Power Layer: Supports 100A continuous current (temperature rise <20℃), meeting the requirements of three-phase meter CT/PT sampling circuits.
  • HASL Pad Reinforcement: 100% through-hole solder fill, passing 3 reflow cycles without warping (IPC-A-610 Class 3 standard).

Enhanced Environmental Adaptability

  • HASL layer + conformal coating, passing 96-hour salt spray test (IP54 protection rating).
  • High-low temperature cycling verification from -40℃ to +85℃, with a lifespan >15 years (IEC 62053-22 certified).

II. PCB Manufacturer's Professional Capabilities

Capability Item Parameter Standards Customer Value
Precision Circuit Manufacturing Line width/spacing ≥4mil, positioning hole tolerance ±0.05mm Compatible with high-precision metering ICs like ATT7035/STM32
HASL Process Control Tin layer flatness ±25μm, lead-free certified (RoHS 3.0) Soldering first-pass yield >99.2%
Rapid Mass Production Delivery 72-hour prototypes (including HASL), 15-day completion of 10K mass production Shortens meter market launch cycle by 30%
Cost Optimization Solutions KB substrate substitution (Shengyi Tech S1141), cost reduction by 25% 4-layer board unit price competitive

2025 Technology Upgrades: The HASL process is compatible with blockchain security chips, supporting energy data encryption and blockchain uploading. AI-diagnosed pad design improves fault prediction accuracy by 30%.

High-Layer Count PCBs Technics Capacity
No. Item Description DataSheet
Layer Layer 1-98
Material Brand SY, ITEQ, KB, NanYa, Doosan, Isola, TUC, EMC, Ventec
Surface treatment HASL lead-free,Immersion Gold, OSP, Immersion Tin, Immersion Silver,
Plating Gold, Plating Tin, ENEPIG
Selectivity surface treatment ENIG+OSP, ENIG+G/F, Flash Gold+G/F, Immersion Silver+G/F, Immersion
Tin+G/F
Solder mask color Green, Yellow, Black, Matte black, Blue, Red, White,Matte green
Silkscreen color White, Yellow, Black
Max board size with 2L mm 2000*1500mm
Max board size with 4L,6L mm 1200*1000mm(Exceeding 570mm shall be reviewed)
Max board size with more than 8L mm 1200*1000mm(Exceeding 570mm shall be reviewed)
10  Min board size mm 0.5*1.0mm(thickness≤0.5mm), 1.0*2.0mm(thickness≥0.5mm)
11  Min outline tolerance mm ±0.05mm(Laser Routing), ±0.1mm(Mechanical Routing)
12  PCB Board Thickness mm 0.13-8mm
13  Double side board thickness mm 0.13-3.6mm
14  4Layers board thickness mm 0.30-7mm
15  6Layers board thickness mm 0.6-8mm(6L), 0.8-8mm(8L), 1.0-8mm(10L), 1.0-8mm(12L)
16  The tolerance of board thickness mm ±0.1mm(thickness≤1.0mm), ± 10%mm(thickness>1.0mm)
17  Min Drilling hole size mm 0.075-0.1mm(Laser), 0. 15mm(Mechanical)
18  Single Max Drilling ww 6.5mm(Drill Bit)
19  Max Drilling ww 50mm
20  Min PTH tolerance mm ±0.05mm, ±0.075mm
21  Min NPTH tolerance mm ±0.05mm(Limitation+0, -0.05mm or +0.05, -0mm)
22  Min hole tolerance ww ±0.075mm
23  Max Drilling tolerance ww ±0.1mm
24  Slot hole mm 0.5-6mm
25  Min slot hole length mm 1.0mm
26  Slot hole aspect ratio mm 1:2
27  Min slot hole tolerance mm Slot width, ±0.15mm
28  Min slot hole tolerance mm Slot width directiont0.10, slot length direction±0.15
29  Countersink hole angle &size Big hole82, 90, 120degree, dia≤10mm
30  Countersink hole angle & size PTH&NPTH, Big hole angle 130degree, The dia of the large hole is not
greater than 6.3mm
31  Min pattern width/spacing mm 0.075mm/0.075mm
32  Pattern width tolerance mm ±20um
33  Min pad mm 0.15mm
34  FR-4 PP 106, 1080, 3313, 2116, 7628
35  Mult press blind buried hole production Press on the same sides5
36  Max bore diameter of pad hole plug hole mm 0.4 Multi press blind & buried hole board
37  Min thickness of inner mm 0.05(none blind buried hole), 0. 13(blind buried hole)
38  Min inner mil 3(18um base copper), 4(35um base copper), ≥3mil
39  Inner layer treatment Brown Oxygen
40  Min inner pattern spacing
(105um base copper, after compensation)
mil
41  Min inner layer pattern spacing
(140um base copper, after compensation)
mil
42  Min innner layer pattern spacing
(18um base copper, after compensation)
mil
43  Min inner layer pattern spacing
(35um base copper, after compensation)
mil 3.5 
44  Min inner layer pattern spacing
(70um base copper, after compensation)
mil
45  Min inner layer pattern width
(105um base copper, before compensation)
mil
46  Min inner layer pattern width
(140um base copper, before compensation)
mil
47  Min inner layer pattern width
(18um base copper, before compensation)
mil
48  Min inner layer pattern width
(35um base copper, before compensation)
mil
49  Min inner layer pattern width
(70um base copper, before compensation)
mil
50  Min outer layer pattern spacing
(105um base copper, after compensation)
mil
51  Min outer layer pattern spacing
( 12, 18um base copper, after compensation)
mil 3.0(18um), 2.5(12um)
52  Min outer layer pattern spacing
(140um base copper, after compensation)
mil
53  Min outer layer pattern spacing
(35um base copper, after compensation)
mil 3.5 
54  Min outer layer pattern spacing
(70um base copper, after compensation)
mil
55  Min outer layer pattern width
(105um base copper, before compensation)
mil
56  Min outer layer pattern width
( 12, 18um base copper, before compensation)
mil 3.5(18um), 3(12um)
57  Min outer layer pattern width
(140um base copper, before compensation)
mil
58  Min outer layer pattern width
(35um base copper, before compensation)
mil 4.5 
59  Min outer layer pattern width
(70um base copper, before compensation)
mil
60  Min.spacing from pattern to pad, pad to pad
for outer layer(after compensation)
mil 3(12, 18um), 3.5(35um), 5(70um), 6(105, 140um)
61  Min.outer pattern and spacing with blind/buried
holes plated many times(>=2times)
mil 3.5/3.5 (before compensation)
62  Min distance from inner layer edge without
copper leakage
mil 10 
63  Min inner layer isolation width mil
64  Min inner layer isolation ring mil 8(≤6layer), 10(≥8layer)
65  Min single side width of inner pad
(none blind buried hole)
mil 4.5(18, 35um, Can be partial 4), 6(70um), 8(105um)
66  Min single side width of inner pad
(laser hole)
mil
67  Impedance tolerance % ±5Ω(50Ω), ± 10%(≥50Ω);
≥50Ω±5%(need to evaluate when it requests),
68  Min BGA pad diameter mil 7mil
69  Min pad diameter mil 12(0.10mmMechanical or laser drilling)
70  Min hole copper thinckness
(none blind buried hole)
um average 25, min single point≥20
71  Min hole copper thinckness
(blind buried hole)
um averager 20, min single point≥18
72  PP thickness(min) um 0.075(only H oz base copper)
73  ENIG: gold thickness um 0.025-0.10
74  ENIG: nickle thickness um 3-5
75  Immersion silver.silver thickness um 0.1-0.3
76  Min HASL LeadFree/pure tin thickness um 0.4 
77  Gold Finger:gold thickness um 0.25-1.3(The required value is the thinnest point)
78  Gold Finger:nickle thickness um 3-5
79  Flash Gold:gold thickness um 0.025-0.10
80  Golden finger chamfer Angle tolerance ±5
81  Golden finger chamfering margin tolerance mil ±5
82  Min gold finger length inch
83  Min distance between gold fingers mil
84  Gold finger next to the TAB does not hurt
the min distance
mm 7(Means automatic chamfering)
85  Long and short gold finger Can be combined with various surface treatments
86  Surface treatment for long and short goldfinger Immersion gold;Flash gold
87  Immersion tin:Tin thickness um 0.8-1.5
88  Electroplate hard gold thick um 0.15-1.3
89  Flash Gold: nickle thickness um 3-5
90  Max borad thickness of mechanical drilling
0.10mm
mm 0.60 
91  Max borad thickness of mechanical drilling
0.15mm
ww 1.20 
92  Max borad thickness of router bit 0.25mm mm
93  Bow and twist capability limit % 0.1(need to evaluate when it requests ≤0.3)
94  Max Dry film sealing slot 5mm*3.0mm;More than one side of sealing hole15mil
95  Min unilateral width of dry film sealing hole mil 10 
96  Max diameter of dry film sealing hole mm 4.5 
97  Min width of solder mask opening mil
98  Min solder mask thickness um 10 
99  Min S/M bridge width mil 3(green), 5(other color)(base copper≤10Z)(base coppe2-40Z, All in
accordance with the 6mil)
100  Min unilateralI width of solder mask mil 2.5(Allow local2mil)
101  Min solder mask opening (sing side) mil 2(Flash gold local 1.5, other allow local 1)
102  Max diameter of ink plug hole(both side) mm 0.65 
103  Thickness of solder mask ink through hole
cover
um 5/8
104  V-CUT Angle specifications 20。, 30。, 45。, 60。
105  V-CUT(1.0 mm 0.36(20。), 0.4(30。), 0.5(45。), 0.6(60。)
106  V-CUT(1.6 mm 0.42(20。), 0.51(30。), 0.64(45。), 0.8(60。)
107  V-CUT(2.5≤H≤3.0mm) mm 0.47(20。), 0.59(30。), 0.77(45。), 0.97(60。)
108  V-CUT(H≤1.0mm) mm 0.3(20。), 0.33(30。), 0.37(45。), 0.42(60。)
109  V-CUT Symmetry tolerance mil ±4
110  V-CUT Angle tolerance ±5
111  V-CUT Residue thickness mil ±4
112  Blue glue white mesh plug hole max
diameter
mm
113  Min single side of blue cover pattern or pad mil
114  Max diameter of blue plastic aluminum plug
hole
mm 4.5 
115  Min isolation between blue glue and pad mil 12 
116  Min single side carbon cap pattern mil
117  Min isolation between carbon and pad mil
118  Min isolation between carbon and carbon mil 12 
119  Min gridding spacing mil 5( 12, 18, 35um), 8(70um)
120  Min gridding width mil 5( 12, 18, 35um), 10(70um)
121  Min silk width and height
( 12, 18um base copper)
width 4mil, height:23mil
122  Min silk width and height
(35um base copper)
width 5mil, height:30mil
123  Min silk width and height
(70um base copper)
width 6mil, height:45mil
124  Min isolation of silk and pad mil
125  Min test on resistance Ω 10 
126  Min distance from test point to edge mm 0.5 
127  Max test current mA 200 
128  Max test voltage V 250 
129  WNH mil 3.9 
130  Min test pad mil 3.9 
131  Min etch logo width mil 8(12, 18um), 10(35um), 12(70um)
132  Outline tolerance(edge to edge) mil ±4(Complex outlin and inner grooves with this requirement shall be reviewed)
133  Min inner angular radius mm 0.4 
134             Depth control slot hole
( edge) or Blind slot precision(NPTH)
mm ±0.10
135  Special tolerance requirements for board
        thickness (No interlayer structure
mm 2.0±0.1, 2.0-3.0±0.15, 3.0±0.2
136                           i          t)
Max ratio of plate thickness to hole
20:1(not inclue≤0.2mm diameter, more than 12:1 shall be reviewed))
137  Min hole diameter mm 0.45 
138  Outline method Routing,V-CUT,Stamp-hole
139  Min router bit diameter of outline mm 0.6 
140  Min. distance from hole to trace
(Not blind/buried holes)
mil 6(≤8layers), 8(≤14layers), 9(≤28layers)
141  Min.distance from hole to trace
(blind/buried holes)
mil 9(Press one time);10(press two times or three times)
142  Min distance from hole to trace
(Laser drill, 1 or 2-step)
mil
143  Min single-sided width for via hole pad of
outer layer
mil 4( 12, 18um)3.5, 4.5(35um), 6(70um), 8(105um), 10(140um)
144  Min.distance without copper exposure
when outline routing
mil
145  Maximum insulation resistance(for test) 100 
146  Hole resistance test board thickness limit mm 0.38-5.0
147  Hole resistance test aperture limit mm min:0.62mm, max0.25mm
148  ionic soil ug/cm2 1
149  Copper stripping strength N/cm 7.8 
150  Resistance weld hardness H
151  Resistance 94V-0
152  RCC material um copper foil:12,resin:65, 100um(complete55, 90um)
153  Thkickness of blue glue mm 0.2-0.5
154  Min carbon pattern width mm 0.5mm
155  Copper thickness OZ Inner Layer 1OZ35μm)-3OZ105μm\  Top Layer 1OZ35μm)-12OZ420μm

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