Great Wall Circuits Limited
Company Introduction Great Wall Circuits Limited is a newly company which founded in 2008. At beginning we were only focus on manufacturing Printed Circuit Boards. But now GWC has become a rapidly growing worldwide provider of solutions in three principal areas Printed Circuit Boards, PCB Assembly and Components Procurement. We are dedicated to building solid partnerships and providing flexible solutions to enable our customer s success. We have years of experiences in Electronics field. From prototype to production and scheduled deliveries we are able to guarantee a complete service with technical backup, offering a cost advantage and continuity of supply. Our service include offering 1.1Rigid PCB (up to 22 Layers), 2Flexible PCB/FPC (1~6 Layers), 3Rigid-Flex (2~10 Layers), 4Aluminum-based PCB (1~4 Layers), 5High Density Interconnection/HDI PCB, 6High frequency material PCB 2. Assembly Services 3. Components purchasing Company's Culture: The Core Values: Integrity, Responsibility, Close attention Our core competitiveness: Quality, Technology, Speed, Cost, Flexibility Quality Policy: High quality, High efficiency; Promise keeping and Sustainable development
Great Wall Circuits always take the principle of " Act by heart, Make the Best ", with years of experiences and vast resources, do everything we can to providing customer with excellent products, comprehensive technical support, to make sure the new and old customers come from all over the world can get a most competitive price, the safest time of delivery, and the prefect quality service. The trust of every customer is our support and encouragement, so we always remember Quality on my hand and Customer in my heart ". Great Wall Circuits----Your Best Choices! PCB Manufacturing As a full-service printed circuit board supplier, Great Wall Circuits offers a complete line of products and services, from low volume, quick-turn prototype manufacturing to medium and high volume production. We offer a complete capability to meet virtually any requirement, ranging from single-sided through to 22 layers. Rigid PCB Board Types.Single-Sided Rigid Boards.Double-Sided Rigid Boards with or without plated through-holes.multilayer (up to 22 layers) with normal as well as blind and/or buried vias.hdi (High Density Interconnect) and Microvias.Multilayer RF/Microwave Boards
Substrates.High temperature FR4.Standard Epoxy Glass NEMA grade FR4.Exotic materials with higher maximum operating temperatures, Lower coefficients of expansion and/or higher Tg Levels.Polyimide, Polyester or PET material.rf/microwave materials including Teflon Improved bonding of through-hole plating and solder mask coating Board Options.RoHS Compliance / Gold on Nickel Contact Fingers.CNC Routing / Scoring (V Grooving) / Panel Routing.Screen Printed Component Legends.Liquid Photoimageable Solder Mask Inks (LPSM).Dry Film Solder Mask (DFSM) Screen Printed Conductive Inks (Carbon).Bare Board testing including Surface Mount Pads Board Finish Alpha Silver / Hot Air Leveled / Solder Mask Over Bare Copper (SMOBC) / Immersion Gold / Electrolytic Gold / OSP (Organic Solder ability Preservative), etc. Applications Single sided PCB common used for power supplies, Relays, Timing circuits, Sensor products, LED lighting, Radio and stereo equipment, Calculators, Coffee makers, Vending machines, etc.
Double sided application: Industrial controls, Power supplies, Converters, Control relays, UPS systems, Power conversion, Instrumentation, Regulators, Hard drives, Phone systems, Test equipment, Amplifiers, Traffic systems, etc. Multilayer printed circuit boards's applications: Computers, File servers, Data storage, Signal transmission, GPS technology, Industrial controls, Satellite systems, Test equipment, X-ray equipment, Fiber optic receptors, Atomic accelerators, Weather analysis, etc. Flexible PCB Flexible circuit interconnections give many advantages over discrete wiring, savi ng in space, weight, labor and inventory, all adding to cost reduction and ease of prod uct assembly. Great Wall Circuits manufacture high reliability flexible printed circuits on polyi mide substrates using advanced manufacturing processes. We specialize in single and double-sided circuits, as well as multilayer and flex circuit assemblies. The flex circui ts are built to the exacting specifications of our customers, meeting the most demandi ng of applications in the ultrasound probe, medical device, semiconductor test & man ufacturing equipment, industrial equipment, and aerospace markets. With all engineeri ng, tooling, and manufacturing operation, The Reason to use FPC (Flex Circuits) Reduce weight and space Meet dynamic flexing requirements Flexing for easier installation and service Impedance control
Increase reliability and repeatability Thermal management Improve aesthetics Eliminate connectors Provide uniform electrical characteristics for high speed circuitry Reduce assembly cost Advantage PCBs We were focus on Printed Circuit Boards since we were founded. Along with the development of these years, we have built our strength in some field of PCB boards. Standard PCB: Double-Sided rigid and flex printed circuit boards are account 80% by the proportion of our sales. Multilayer PCB: Multilayer PCB with rigid or flex is our main operation direction. Multilayer PCB is a relatively cheap way of building sophisticated electronic devices. Most our strength is 4-12 layers, controlled impedance +/- 10% standard (+/- 5% tolerance advanced option), produced using lead free RoHS compliant materials and finishes. Our expertise and knowledge has proved invaluable in providing solutions to our client's satisfaction. LED Light PCB:
For LED Light application, the most popular PCB types are include FR4 Led PCB, Flex Led PCB and Aluminum PCB. And Flex Led PCB is one of the fastest growing markets in the PCB industry of Led PCBs. In addition, we can also provide rigid-flex circuit boards by using our vast net work of fully qualified partners. Anyway, we take the responsibility to offer good quality to our customers. We won't receive the order that out of our capability. So please rest assure to do business with Great Wall Circuits. PCB Assembly Prototype PCB or PCBA prototyping is often essential with the development of new products and application. Prototypes can eliminate issues early on before large volumes of boards are produced, it also allow the clarification and refinement of the customers requirements, therefore the final design would be more accurate and the cost would be less. Moreover, it can highlight both the seen and unforseen technical issues to be address Knowing that before production can begin a product must be designed and tested, GWC not only welcomes but also encourages prototype builds. Since time is normally of the essence, we have staff dedicated to turn around prototypes in as timely a manner as possible. Through-Hole Manufacturing Our assembly lines support both simple and complex board assemblies. For assemblies like nuts/bolts, riveting and studs, that require manual/mechanical assembly, we have a team of highly trained, qualified and experienced assemblers, who work under the supervision of qualified engineering staff.
Surface-Mount Assembly We have the skill, expertise and equipment to meet your needs! Cable & Harnesses Assembly Our cable assembling unit is capable of handling both simple to complex cabling jobs. Our strict adherence to specifications and quality, in house engineering and our aggressive pricing are just a few reasons why you should choose us for your next product. Mechanical Assembly If you have an assembly that requires hands on mechanical assembly look no further. At GWC all the parts are assembled in one process at one location thereby reducing shipping and inventory costs. So the number of defects and errors in assembly is bare minimum. All the raw materials are also thoroughly inspected on-site ensuring high quality consistently. Repair Services (SMT & T/H) Do you need a part desoldered and replaced on a populated assembly? Do you need someone to trouble shoot a previously functional assembly? GWC ia able to remove a replace almost any component including BGAs. Whether you require board level assembly only, subassembly or final product assembly---you can rely on GWC to provide a tailored service. Components
Components Procurement is one of the featured service we can provide. We can purchase all kinds of electronic parts of all brands including Integrated Circuits(IC), Battery, Fuse, LCD, LED Display, Transformer, Buzzer, Inductor, Laser, Transducer, Capacitor, Hardware accessories, MCU, Triode, Diode, LED Diode, Connector, Rectified, Sensor, Crystal, Jack, Relay, Speaker, Cable, Resistor, Switch, Terminal, Potentiometer and so on. LCD Screens(Liguid Crystal Displays) We can provides a range of high quality standard and customized LCD panels and modules in various technologies including TN, STN, HTN and FSTN. Packaging options include COB, COG, TAB. Membrane Keypads PCB mounted and membrane switch type, graphite inks for higher usage applications, full range of finishes including embossing, debossing, selective texturing and raised graphics, flat key, tactile and polydome, embedded dispay LED's and backlighting and so on. Solder Paste Stencils We are also able to supply laser cut, framed and unframed solder paste stencils that will meet our customers highest standards at a very competitive price. Capabilities Process Capabilities Item Technical Index 1-22 layers(rigid Board) Layer 1-10 layers(flexible Board) Multi-layer
Base Material Cooper Thickness Min. Hole Size Min. Line Width Min. Line Spacing FR4, PI, PET Rigid PCB Flexible PCB 0.2mm Rigid PCB Flexible PCB Rigid PCB Flexible PCB 0.5Oz to12qz 18μm-105μm 0.1mm 3mil 0.1mm 3mil Surface Treatment External Treatment External Tolerance Solder Mask Color OSP/HASL Lead Free/ ENIG/Immersion Gold/Immersion Tin Precise V-cut, externally pressed or milled, laser appearance ±0.05mm Blue/White/Green/Red/Yellow Covered in layers with PI and PET film Welding Resistance Film Sensitive welding resistant oil/ welding resistant dry film/silk printing oil/separable welding resistant oil Type of oil Applicable to silk printing in multi-colors Quality Assured At Great Wall Circuits obviously quality is at the forefront of all of our Printed Circuit Board manufacturing and assembly processes. Due to we know the importance of quality when it
comes to electronics. And we also know that our customers brand and reputation depend on how their products perform in the real world. For us, quality is about everything we do. Quality Management: Great Wall Circuits has developed a series of management procedures and approaches to assure the product delivery meets the customers requirements through the whole product realization from the selection of the suppliers, WIP inspection, and outgoing inspection to the customer service. Our Quality Policy: High quality, High efficiency; promise keeping and sustaining development Quality Objective: Production department: Delivery rate 95% on time Quality department: Customer send back goods rate 1% Quality department: Customer complaining rate 3% Planning department: Supplying rate in time of the supplies 98% Quality department: Qualification rate of the finished product 98% Personnel department: Qualification rate that train 95% Market department: Customer satisfaction is up to standard to lead 80% Engineering From quick-turn prototypes and volume production, every phase is monitored and managed by the highly qualified professionals with UL, ISO, Lead-free. Quality is the best guarantee to maintain customer's loyalty. Here are some quality certificates:
Factory Tour Our factory is located in Xinyuan Industrial Zone, Bao an District, Shenzhen. We have a number of advanced mechanical equipments and have a group of professional engineers and technical personnel. Besides, our factory has more than 200 skilled workers that we are confident to provide you with high quality and efficient products.
Contact us We work closely with our clients to understand your particular requirements ensure that we can tailor our service precisely to your needs. Contact us with your requirements, and see what we can do for you. Contact Person: Tina Huang Skype: sales2-gwpcba Tel: 86-755- 29196695 E-mail:sales2@gw-pcba.com MSN: sales2@gwpcba.com Fax:86-755-29196655 Office: 420 Room, A Building, Entrepreneurial Tower, Xingwei Community, Fuyong Street, Bao'an District, Shenzhen Welcome to contact us! We sincerely hope to provide you with high-quality products and satisfactory services! Look forward to becoming your business partners!