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<title><![CDATA[EC21 Product Catalogs - fr 4]]></title>
<link><![CDATA[https://www.ec21.com/ec-market/fr_4--10120303/1/fr 4.html]]></link><item>
<title><![CDATA[FR4 PCBs  with 4  Layers]]></title><link><![CDATA[https://finest202104.en.ec21.com/FR4_PCBs_with_4_Layers--11378521_11378526.html]]></link><description><![CDATA[Base Material: fr4 laminate
Layer: 4 layer
Surface finished: ENIG
Profile: CNC+V-cut
Copper thickness: 1OZ
Board thickness: 1.6mm
Break down voltage for insulated layer: &gt;2kV
]]></description><pubDate><![CDATA[20230519]]></pubDate></item>
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<title><![CDATA[FR4 PCB]]></title><link><![CDATA[https://cttpcb.en.ec21.com/FR4_PCB--10919275_11050428.html]]></link><description><![CDATA[FR4 PCB
Advantages to FR4 with CTT.
1. After 18 years of cooperation with different customers all over the world, so we have accumulated a wealth of PCB manufacturing
experience. FR4 PCB
enable us to]]></description><pubDate><![CDATA[20231206]]></pubDate></item>
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<title><![CDATA[Peelable S/M 2Layers Lead Free HASL FR4]]></title><link><![CDATA[https://chanyee.en.ec21.com/Peelable_S_M_2Layers_Lead--11457152_11869936.html]]></link><description><![CDATA[Peelable S/M 2Layers Lead Free HASL FR4
Product Description
Damage from additional thermal deviation
Coplanarity issues due to pad-to-pad coating thickness variations
Potential coplanarity issues wit]]></description><pubDate><![CDATA[20231124]]></pubDate></item>
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<title><![CDATA[6Layer RO4350+FR4]]></title><link><![CDATA[https://ayesha19920906.en.ec21.com/6Layer_RO4350_FR4--11384983_11390004.html]]></link><description><![CDATA[Back drill Copper coin, Depth control routing, Impedance control, usually for telecommniction
Advantages：
Good pricing
Focus on low to medium volume production
Quick and on-time delivery
Internatio]]></description><pubDate><![CDATA[20210531]]></pubDate></item>
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<title><![CDATA[China Electronic Custom 1.6mm FR4 PCB,PCB Circuit Board,HDI PCB Manufacturer]]></title><link><![CDATA[https://dreamlandpcb888.en.ec21.com/China_Electronic_Custom_1.6mm_FR4--11754176_11754223.html]]></link><description><![CDATA[We produce 1-30 layers PCB, 1-14 layers flexible PCB, and 2-12 layer flex-rigid pcb.
]]></description><pubDate><![CDATA[20230412]]></pubDate></item>
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<title><![CDATA[Black Core FR4 PCB VT-42 Laminate]]></title><link><![CDATA[https://hjl39506147520.en.ec21.com/Black_Core_FR4_PCB_VT--11890882_11905226.html]]></link><description><![CDATA[PRODUCT DESCRIPTION
Black core PCB material introduction
Dicy Cured System Standard FR-4 (Tg140)Core Thickness: .002”(0.05mm) to .200” (5mm), available in sheet or panel formCopper Foil: 1/4oz to]]></description><pubDate><![CDATA[20240222]]></pubDate></item>
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<title><![CDATA[6 Layer PCB with Immersion Gold]]></title><link><![CDATA[https://pcbpcbaseller.en.ec21.com/6_Layer_PCB_with_Immersion--10961296_12051711.html]]></link><description><![CDATA[Base Material
Fr4 TG140
Board Thickness
1.6 mm
Copper Thickness
1OZ
Min. Hole Size
8mil (0.2mm)
Min. Line Width/ Spacing
6mil (0.154mm)/5mil (0.125mm)
Solder mask Color
Green
Silkscreen Color
White
S]]></description><pubDate><![CDATA[20250324]]></pubDate></item>
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<title><![CDATA[Multilayer PCBs]]></title><link><![CDATA[https://haosens2010.en.ec21.com/Multilayer_PCBs--4624610_4624612.html]]></link><description><![CDATA[Our PCB Technical Specifications:
- Base material: FR4, Aluminum, Ceramic,Rogers, F4BK, F4BT, TP, PF, CEM-1, CEM-3, etc.
- Board thickness: 0.30 to 3.20mm (12 to 126mil)
- Copper thickness: 0.50 to 5]]></description><pubDate><![CDATA[20250220]]></pubDate></item>
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<title><![CDATA[Professional Experience Metal Core PCB Circuit Board Enepig PCB Fabrication Factory]]></title><link><![CDATA[https://2pcbtech.en.ec21.com/Professional_Experience_Metal_Core_PCB--11782526_11782527.html]]></link><description><![CDATA[FR4).
Double Sided PCB
A double-sided PCB, by definition, has two conductive copper layers separated by an insulating dielectric, typically woven glass fabric (FR4). A double-sided PCB is different f]]></description><pubDate><![CDATA[20230505]]></pubDate></item>
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<title><![CDATA[4 Layer PCB]]></title><link><![CDATA[https://szxpcb.en.ec21.com/4_Layer_PCB--3415393_5363968.html]]></link><description><![CDATA[we&apos;re one of the professional pcb manufactory in China. Selling various kinds of printed circuit boards which apply to all area electronics products as well as your R&amp;D requirements. If you have any ]]></description><pubDate><![CDATA[20110423]]></pubDate></item>
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<title><![CDATA[Hybrid PCB Stack-up Optimizes Signal Integrity and the PCB Cost]]></title><link><![CDATA[https://bcco.en.ec21.com/Hybrid_PCB_Stack_up_Optimizes--10882619_10944709.html]]></link><description><![CDATA[4350B high frequency material and layer 3 to
layer 4 is the core of FR-4 epoxy glass. The 2 cores are bonded by a sheet of
adhesive (prepreg).
Types of hybrid PCB 
The
hybrid PCB can be a mixture of ]]></description><pubDate><![CDATA[20230113]]></pubDate></item>
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<title><![CDATA[12 Layers PCB High TG Thick Copper Board]]></title><link><![CDATA[https://rcypcb.en.ec21.com/12_Layers_PCB_High_TG--5377851_5377852.html]]></link><description><![CDATA[Layers: 12
Material: FR4 TG170
Solder mask color: green
Copper thickness: 4oz
Board thickness: 2.5mm
Surface finish: ENIG
Packing: vacuum
Min. drilled hole size: 0.2mm
Certificate: UL, ISO 9001, ISO ]]></description><pubDate><![CDATA[20130506]]></pubDate></item>
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<title><![CDATA[Aluminium PCB]]></title><link><![CDATA[https://tendtronic.en.ec21.com/Aluminium_PCB--9385605_9497801.html]]></link><description><![CDATA[FR4, CEM1, CEM3, FR2, FR1, XPC,IMS,FR-5, High Tg, Aluminium ,Green Material 
PCB Production Highlights: Single-Sided PCB, PTH Double-Sided PCB, NPTH Double-Sided PCB, Flexible PCB(FPC), Multilayer PC]]></description><pubDate><![CDATA[20150505]]></pubDate></item>
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<title><![CDATA[Red Ink ENIG Multilayer PCB]]></title><link><![CDATA[https://abiscircuits.en.ec21.com/Red_Ink_ENIG_Multilayer_PCB--10316737_10316803.html]]></link><description><![CDATA[1
Layer
1-20 layers
2
Material
FR-4(High TG),CEM-1,Aluminum base,CEM-3, FR4 Halogen Free,Rogers,Polyimide,TEFLON
3
Board thickness
0.2mm-6mm(normally 1.6mm)
4
Max.finished board size
1200*600mm
5
Min]]></description><pubDate><![CDATA[20200402]]></pubDate></item>
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<title><![CDATA[8 Layers PCB]]></title><link><![CDATA[https://adplus01.en.ec21.com/8_Layers_PCB--10655888_10656040.html]]></link><description><![CDATA[FR-4, High-Tg FR4, Aluminum, Rogers, Arlon, Taconic, Polyimide, etc., 
Technic: Blind &amp; Buried hole, countersink hole, castle hole (half hole), Minimum drilling mechanical hole 0.15mm, Minimum laser ]]></description><pubDate><![CDATA[20180131]]></pubDate></item>
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<title><![CDATA[Single Side Aluminium PCB Board]]></title><link><![CDATA[https://mktpcb.en.ec21.com/Single_Side_Aluminium_PCB_Board--10712329_10712359.html]]></link><description><![CDATA[FR-4 based dielectric is usually think (about 100um). Compared to a classical printed circuit board, the IMS/MCPCB provides a better heat dissipation. It is one of the simplest way to provide efficie]]></description><pubDate><![CDATA[20180601]]></pubDate></item>
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<title><![CDATA[SMT Circuit Board Manufacturer Custom Electronic Assembly PCB Pcba]]></title><link><![CDATA[https://cesgatepcbec21.en.ec21.com/SMT_Circuit_Board_Manufacturer_Custom--11119511_11132394.html]]></link><description><![CDATA[FR-4; High TG FR-4; Aluminum; CEM-1; CEM-3;
Board Thickness:
0.2mm-4mm
Surface Finishing:
HASL, LF HASL, Imm Gold, Imm Silver, OSP etc
Product name:
SMT circuit board manufacturer custom electronic a]]></description><pubDate><![CDATA[20200508]]></pubDate></item>

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