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keypads manufacturers

Our History
HongTai Technology Co., Ltd, a China-Hong Kong joint venture enterprise, is established at 1997 to focus on electronic PCB and assembly service. At the background of consumer electronics developing rapidly and China’s Reform and Open policy, Shenzhen City has great advantages in electronics manufacturing, including lower labor cost, government’s tax  reduced policy, lower land cost, etc. At the beginning, HongTai offer PCB and PCBA OEM service, then we enlarged our products line, and we start to develop FPC and membrane switch.
Our Factory
HongTai specializes in PCB, flex PCB and PCB assembly. They are widely used in computers, industrial controls, digital consumer electronics, medical devices, IT communication, aerospace and other fields.
One-stop services includes PCB layout,PCB fabrication, components sourcing, PCB assembly and finished product assembly.
Advanced test equipment are imported from American, Japan and Germany.  HongTai has passed ISO9001, ISO14001 certificate, while products get UL authentication.
No MOQ and prototype orders are accepted. Quality, delivering, after-sales service are valued by us.
HongTai is willing to develop business relationship with customers both at home and abroad. Our principle to our customers are, “Be professional, be honest, be creative and customers first, quality first, service first”. You are warmly welcomed to visit us.
Production Equipment
Our Product
PCB; PCB layout design and cloning; PCB Assembly; Flex PCB; Membrane switch
Product Application
Consumer Electronics; Medical Device; Automotive Electronic; Telecom;   Aeronautics&Astronautics, etc.
Our Certificate
ISO9001, ISO14001, RoHS certification, UL certification
Our Capabilities
PCB Capability
HongTai Technology Co., LTD
1Base MaterialFR-4, High TG FR-4 , Halogen Free material   ,CEM-3,CEM-1,PTFE,Rogers   ,Arlon ,Taconic, Aluminum base, Teflon, PI ,etc
2Layers1-40 ( ≥30 layers needs review )
3Finished inner/outer copper thickness0.5-6OZ
4Finished board thickness0.2-7.0mm(≤0.2mm needs review),≤0.4mm for HASL
Board thickness≤1.0mm: +/-0.1mm
1<Board thickness≤2.0mm: +/-10%
Board thickness>2.0mm:   +/-8%
5Max panel size≤2sidesPCB: 600*1500mm
Multilayer PCB: 500*1200mm
6Min conductor line width/spacingInner layers: ≥3/3mil
Outer layers: ≥3.5/3.5mil
7Min hole sizeMechanical hole: 0.15mm
Laser hole: 0.1mm
Drilling precision: first drilling , First drilling:   1mil, Second drilling: 4mil
8WarpageBoard thickness≤0.79mm: β≤1.0%
0.80≤Board thickness≤2.4mm: β≤0.7%
Board thickness≥2.5mm: β≤0.5%
9Controlled Impedance+/- 5 % Ω(<50Ω),+/-10%(≥50Ω),≥50Ω+/-5% (needs review)
10Aspect Ratio15:01
11Min welding ring4mil
12Min solder mask bridge≥0.08mm
13Plugging vias capability0.2-0.8mm
14 Hole tolerancePTH: +/-3mil
NPTH: +/-2mil
15Outline profileRout/ V-cut/ Bridge/ Stamp hole
16Solder mask colorGreen, yellow, black, blue, red, white, matte green
17Component mark colorwhite, yellow, black
18Surface treatmentOSP: 0.2-0.5um
HASL: 2-40um
Lead free HASL: 2-40um
ENIG: Au 1-10U’’
ENEPIG: PB 2-5U’’/ Au 1-8U’’
Immersion Tin:0.8-1.5um
Immersion silver: 0.1-1.2um
Peelable blue mask
Carbon ink
Gold plating: Au 1-150U’’
19E-TestFlying probe tester :    0.4-6.0mm,max   19.6*23.5inch
Min spacing from test pad to board edge :  0.5 mm
Min conductive resistance :   5 Ω
Max insulation resistance  :    250  MΩ
Max test voltage :    500 V
Min test pad diameter : 6 mil
Min test pad to pad spacing  : 10 mil
Max test current    :    200 MA
20AOIOrbotech SK-75 AOI : 0.05-6.0mm,max 23.5*23.5inch
Orbotech Ves machine :    0.05-6.0mm,max   23.5*23.5inch
PCBA Capability
HongTai Technology Co., LTD
Tech Standard
Type of AssemblyTHD,SMT,SMT&THD Mixed
ComponentsPassived  Parts, smallest size 0201, BGA, QFN, POP , Finepitch   to 8 mils
Bare Board SizeSmallest: 6.35mm*6.35mm
Largest :  508mm*508mm
Min IC & QFN Pitch0.012”  (0.3mm)
Max BGA Size74mm*74mm
Type of ServiceTur-key,Partial Tur-key or Consignment
TestingX-ray inspection
AOI (Automatic Optical Inspection)
ICT (In-Circuit Test/ Functional Testing)
FPC Capability
HongTai Technology Co., LTD
1Production CapabilitySingle-sided:20,000M²/MonthN/A
2Base MaterialPolyimide (Kapton) ( PI )Polyester (PET)
3LayersFlexible Printed Circuit(FPC) Board:1~6layers8Layer
Rigid-Flex Board:2~6layers8Layer
4Maximum Size250*1200mm500*1200mm
5Maximum Thickness0.75mmN/A
6Minumum Thickness0.05mmN/A
7Product thickness tolerance±  0.03mm±  0.02mm
8Copper Thickness12um (1/3OZ),18um (1/2OZ) , 35um (1OZ),   70um (2oz)6um(1/4OZ),   140um (4OZ)
9Minimum Line Width/ Distance between stitchings± 0.05mm± 0.03mm
10Stiffener material typePI / FR4 / PET / Steel pieceN/A
11Etching tolerance±  0.02mmN/A
12Minimum Hole Diameter0.1mmN/A
13 Hole tolerancePTH: +/- 0.05mm
NPTH: +/-0.03mmN/A
14Outline profilePunching , Laser cutN/A
15Outline Dimension     tolerance±  0.1mm±  0.05mm
16Solder mask colorYellow, Black, whiteGreen, Red, Blue
17Surface treatmentOSP: 0.2-0.5um
ENIG: Au 0.03um - 0.15um
Immersion Tin:0.5-1.5um
Immersion silver: 0.1-1.2um
Gold plating: Au 1-150U’’HASL : 1- 20um
18Thermal shock test288 ± 5 ℃   , 10S , 3timesN/A
19Environmental RequirementROHS N/A
Membrane switch / Keypad Capability
HongTai Technology Co., LTD
1, Electronic properties
Circuit Grade:35V(DC),100MA,1W
Contact Resistance:10Ω~500Ω
Depending on wire length and the materials
Insulation Resistance:100MΩ 100V
Medium Withstand Voltage:250VRms(50~60HZ 1min)
Contact Bounce:<5ms
Service Life:Flat Type:>5 million times
Touch Type: > 1 million times
2, Mechanical properties
Operating Pressure:Flat Type:57-284g  ( 2~10 OZ)
Touch Type: 170-397g ( 6 ~ 14 OZ )
Switching Position:Flat Type: 0.1~0.5mm
Touch Type: 0.6~1.5mm
3, Environmental Parameters
Operating Temperature: - 20 ~ + 80
Storage Temperature: - 40 ~ + 80
Temperature :40, 90% ~ 95% , 240 hours
Vibration : 20G,max.(10~200Hz,   Mil-SLD-202,M204. condition B)
Production Market
HongTai has built up cooperation with customers from all over the world. Most of our circuit board customers come from North America and Europe. We aim to provide professional electronic solutions to help our customers save time, money and energy.
Our service
We help to make you idea to be produced, PCB and PCBA prototyping first, and then high volume. We take responsibility of the PCB, flex PCB board, PCBA and membrane switch we make. keypads manufacturers