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Govt. of India recognised One Star Export House · DGFT, valid 25/11/2025 – 25/11/2030Polyfit is an A-Level SQ certified companyTÜV Rheinland certified: structural steel fabrication (EXC3), welding processes & inspectionRecognised by TATA Power Solar with the Green Practices Excellence Certificate for our 400 kWp solar power system
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Polyfit EMS Team

Electronics Manufacturing Services division

Engineers and quality specialists from Polyfit’s electronics manufacturing services division in Chennai, which builds SMT, through-hole and mixed-technology assemblies in an ISO 7 cleanroom to IPC-A-610.

PCB Inspection explained - SPI AOI and x-ray
Electronics Manufacturing Services(EMS) · 2 min readPCB Inspection Explained: SPI, AOI and X-rayEach inspection method sees something the others miss. What SPI, AOI and X-ray actually check, and how they fit together on an assembly line.
SMT Vs THT in Electronics Manufacturing Services
Electronics Manufacturing Services(EMS) · 2 min readSMT vs Through-Hole (THT): Choosing the Right Assembly MethodSurface mount is the default, but through-hole is still the right call for some parts. A practical guide to choosing between them, and why most real boards use both.
Electronics Manufacturing Services(EMS) · 3 min readCommon PCB Assembly Defects and How to Prevent ThemMost PCB assembly defects trace back to a handful of causes. What each one looks like, why it happens and how a well-run line prevents it.
Electronics Manufacturing Services(EMS) · 3 min readPrototype, Low-Volume and High-Volume PCB Assembly: What ChangesThe same board is built very differently at 10, 500 and 50,000 pieces. Here is what changes at each stage, and how to plan the move to production.
Electronics Manufacturing Services(EMS) · 3 min readDesign for Manufacturing (DFM): Getting Your PCB Ready for ProductionA board that works on the bench is not always a board that builds well. These are the DFM issues that come up most often, and how to fix them before they cost you.
Electronics Manufacturing Services(EMS) · 2 min readIn-Circuit Test (ICT) vs Functional Test: Which Does Your PCB Need?ICT tells you the board was built right; functional testing tells you it works. How they differ, and how to combine them sensibly.
Electronics Manufacturing Services(EMS) · 4 min readThe PCB Assembly Process, Explained Step by StepPaste, placement, reflow, inspection and test: what happens to a circuit board at each stage of assembly, and where problems get caught.
Electronics Manufacturing Services(EMS) · 3 min readReflow, Wave, Selective and Vapor Phase Soldering: How They CompareFour ways to solder a circuit board, each with a job it does best. A plain-language comparison of reflow, wave, selective and vapor phase soldering.
Electronics Manufacturing Services(EMS) · 3 min readQuality Control in Electronics Manufacturing: IPC, ESD, MSL and CleanroomsReliable boards come from controls that run through every stage of manufacturing, from parts storage to packing. These are the ones that matter most.
Electronics Manufacturing Services(EMS) · 2 min readPCB Assembly for Automotive, EV and Power ElectronicsBoards in vehicles, chargers and inverters face heat, vibration and high current every day. What changes when you build for these applications.
Electronics Manufacturing Services(EMS) · 2 min readBox Build Assembly: Taking Your Product Beyond the Bare BoardBox build covers everything between a tested board and a finished, boxed product. Handing it to one partner can save time, cost and quality headaches.
Electronics Manufacturing Services(EMS) · 2 min readPCB Assembly for Medical, Industrial, IoT and Consumer ElectronicsThe same assembly line serves very different markets. Here is what changes when the board goes into a medical device, a factory, an IoT sensor or a consumer product.
Electronics Manufacturing Services(EMS) · 3 min readHow to Choose a PCB Assembly Partner in India: A Practical ChecklistPrice matters, but it rarely makes or breaks an EMS relationship. What to check before you choose a PCB assembly partner in India.
Electronics Manufacturing Services(EMS) · 3 min readElectronics Manufacturing Trends Worth Watching (and What They Mean for You)Plenty of trend lists are hype. These are the changes actually showing up on assembly lines, and what they mean for companies that buy electronics manufacturing.
Electronics Manufacturing Services(EMS) · 2 min readElectronic Component Sourcing: How to Avoid Shortages, Delays and CounterfeitsMost delays in electronics manufacturing are sourcing problems, not assembly problems. These habits keep parts flowing and fakes out of your boards.
Electronics Manufacturing Services(EMS) · 3 min readConformal Coating for PCBs: When You Need It and Which Type to ChooseA thin layer of coating can decide whether a board survives humidity, dust and condensation. When it is worth it, and how to choose the right type.
Electronics Manufacturing Services(EMS) · 2 min readEMS vs OEM vs ODM, and Turnkey vs Consigned: The Terms ExplainedWhat EMS, OEM and ODM really mean, how turnkey differs from consigned assembly, and which model suits your product.