Micro welding covers a wide range of joint types across battery packs, medical devices, sensors, electronics assemblies, jewelry framework, dental frameworks, coil terminations, thermocouples and more. This page groups the covered application areas and points readers at the right process — laser, pulse arc, resistance spot, or marking — for each type of joint.
Application choice sits upstream of machine choice. Starting from the joint rather than the machine name is what keeps a recommendation honest.
Battery tab welds route to resistance spot for the same physical reason thin-wall hermetic seams route to laser: the joint physics decide, not the catalog. A supplier that carries only one process has to describe every joint as suitable for that one process; carrying four means the recommendation can start from what the joint actually needs.
First: does the joint need filler metal, a build-up layer, or a cosmetic bead that has to be visible? That points at pulse arc / micro TIG. Second: can current pass cleanly through both sides of the joint, with electrode access and thickness in reach? That points at resistance spot. Third: is heat sensitivity the dominant constraint, with thin walls, hermetic seams or heat-treated features nearby? That points at laser.
Two aligned answers make a confident match, and parameter tuning takes over from process selection. When answers conflict — most often on dissimilar-metal pairs, coated stacks, or extremely fine wire attached to a much heavier terminal — a sample-first evaluation is the only reliable tiebreaker. Paper specs and video demos rarely settle that class of question; a physical weld on the customer's own material does.
Marking is a separate class of tool entirely: not a joint at all, but a permanent surface modification that has to survive downstream chemistry and abrasion. That work routes to a laser marker rather than any welder. For the full decision walkthrough across the four processes, see the how-to-choose page.
Seventeen application areas are documented in depth as standalone pages. Each covers the joint physics, the process choice, the parameter windows and the common failure modes for that specific application.
Terminating magnet wire and motor windings — joining fine, often enamel-coated wire to terminals reliably, ideally without a separate stripping step. Resistance spot and pulse arc both come into play depending on wire gauge, enamel type and terminal geometry. See the deep page →
Forming the junction bead between two dissimilar wires without contamination or a weak joint. Small-gauge thermocouples usually route to a capacitor-discharge or pulse arc process; larger junctions and shielded configurations open other options. See the deep page →
Attaching fine wires and ribbons to terminals, pads and pins across electronics and battery assemblies. Process choice depends on the metals involved, the ribbon dimension, and whether the joint sees mechanical stress in service. See the deep page →
Resistance wire (nichrome, iron-chromium-aluminum) to terminals and lead-in wires, tubular element end seals, hot-cut wire junctions. Fine wire meets bulk terminal; low-conductivity alloys self-heat under the pulse. Resistance spot dominates; pulse arc and laser fit specific cases. See the deep page →
Gauge lead or tab attachment to test articles, load cells and structural monitoring installations. Extremely low heat input required — heat into the substrate changes the residual-stress state that gauges are supposed to measure. Capacitor-discharge resistance spot dominates; laser fits selected cases. See the deep page →
Diaphragm-to-housing and housing-to-interface seal welds for pressure sensors — 316L, Hastelloy and titanium in hermetic sealing applications. Diaphragms are tens-of-microns thin; excess heat dishes them and shifts the measurement range. Laser dominates; pulse arc fits repair scenarios. See the deep page →
Tinned copper ribbon to silver bus lines on silicon wafers, cell-to-cell busbar interconnection, MBB and SMBB round-wire architectures, junction-box lead-outs. Thin brittle wafer plus a narrow temperature window between cold joint and wafer crack. Resistance / thermocompression dominates; laser fits MBB / SMBB / shingled cases. See the deep page →
Cell tab to nickel strip to copper busbar, BMS lead-outs, main busbars, fuse terminals inside lithium portable power stations. Cylindrical / pouch / prismatic form factors need different setups. Resistance spot dominates nickel-strip work; laser handles copper busbars and dissimilar-metal high-current paths. See the deep page →
Fuse element to end caps (blade / cartridge / blow / knife-blade / SMD), terminal-block lugs, busbar bonds, relay contact tips, contactor terminals. Contact-resistance stability at single-digit milliohm targets plus fuse-blow-characteristic preservation set the acceptance criteria. Resistance welding dominates; laser handles miniaturized and dissimilar-alloy contact-tip work. See the deep page →
Solenoid coil lead-outs, armature-to-pushrod joints, micro-motor terminals, SMA (Nitinol) driver strips, small linear-actuator internals. Sub-millimeter magnet wire, magnetic-material welding (arc blow on iron cores), and the no-rework failure mode after assembly. Resistance welding dominates lead-to-terminal work; laser fits magnetic cores; pulse arc handles SMA. See the deep page →
Solid-state diffusion joints on gold/aluminum wire bonds, flip-chip die attach, TAB inner leads and hermetic microelectronic package sealing. Not fusion — surface cleanliness, tool-tip temperature uniformity and applied force drive the outcome. Dedicated TC bonders are a separate machine class; the four MicroWeldPro processes cover the fusion micro-welding around each TC joint. See the deep page →
Coaxial connector body welds, waveguide flange seams, hermetic microwave package lid seals, braid-to-shell joints and RF module chassis spots. Welds must preserve impedance matching, keep the RF path clean of protrusions, and meet hermeticity on ceramic-metal seals under thermal cycling. Laser is the workhorse here; pulse arc / micro TIG covers larger housings; resistance spot fits narrow tacking cases. See the deep page →
Interior joints on hybrid microwave carriers — ceramic substrate metallization to Kovar or molybdenum carriers, lead pin feedthroughs through alumina walls, internal shield-can lid seals, die-attach solder-preform reflow. CTE mismatch between ceramic body, metallization film and lead alloy is the through-line difficulty. Resistance spot is workhorse for pin/pad tacks; laser handles hermetic feedthroughs; pulse arc covers larger lead-frame work. See the deep page →
Assembly-side joints on test-and-measurement instruments — probe body tips and sheath seals, sensor element attach into instrument bodies, micro connector shells, precision housings and hermetic feedthroughs. High-mix low-volume production plus calibration-sensitive dimensional precision make setup and sample-test the pace-setter. Laser leads on distortion-sensitive work; pulse arc handles repair and prototype; resistance spot for sensor lead attach. See the deep page →
Filament coils and cathode assemblies on incandescent, halogen and HID lamps; molybdenum foil pinch-seal joints; fluorescent cathode-to-lead-wire; LED bracket leads and lead-frame terminations; screw and pin base contact welds. Refractory metals (tungsten, molybdenum, tantalum) with dissimilar-metal joints to lower-melting lead-ins — oxidation control and heat bias to the higher-melting side drive the setup. Resistance spot dominates filament-to-lead-in; laser handles the difficult refractory joints and LED side; pulse arc for cathode work. See the deep page →
Edge seals and hem welds on mesh sheets, mesh-to-frame joints, multi-layer stack tacks, cylindrical filter axial seams, mesh-to-end-cap seals and reinforcement band tacks on stainless / nickel / monel / hastelloy wire mesh. Burn-through on thin mesh and large-area consistency across thousands of welds per shift are the through-line difficulties. Resistance seam and spot cover volume production; laser fits fine-wire and hermetic end caps; pulse arc handles heavier frame work. See the deep page →
Metallic honeycomb sandwich panels for aerospace airframes, heat exchangers and acoustic panels — core-to-face-sheet spot patterns, edge closure / perimeter frame attach, core-to-core stitching, insert anchor spots. Thin cell walls (0.02-0.1 mm foil), structural pull-off consistency across thousands of spots and blind access under the face sheet are the through-line difficulties. Indirect resistance spot workhorses volume aerospace panels; laser handles titanium / nickel honeycomb and edge closure; pulse arc for larger perimeter frame work. See the deep page →
Four other application clusters route through the four product lines but aren't yet documented as standalone pages. Grouping them by dominant process shows where the sample-test conversation usually starts.
Cell tab welding, bus-bar termination, pack-level busbar work and prismatic can seams sit mostly on resistance spot for tab-to-terminal joints. Laser steps in on terminals where distortion or downstream sealing constrains the option. Copper stacking, dissimilar-metal tabs and thick-gauge nickel all shift the parameter window, so a sample weld on the customer's own cell chemistry is usually the fastest way to settle the process.
Hermetic seals on sensor housings, medical implant assemblies, catheter tips and endoscope frames pull toward laser. Pulse arc fills in where a filler bead is needed at a repair or joint edge. Thin walls, heat-treated adjacent features and colour-critical finishes all favour a low-distortion laser process — a case where the process selection matters as much as the machine specification.
Mould and die restoration, jewelry framework repair, dental framework rework, and small-part edge build-up sit in pulse arc / micro TIG territory. Filler wire plus the ability to feather each pulse onto an existing edge — often a shape that resistance spot cannot reach and that laser cannot deposit into — is what makes this class of work suit a pulse arc process.
Serial numbering, DataMatrix and QR code marking, compliance mark placement and brand nameplate work sit on laser marking rather than any welder. The mark is a permanent modification of the surface — not a joint — and the machine class, the wavelength, and the fluence window are all different from what a welding laser uses.
Any of the areas above can be quoted through the same channels. When one comes up often enough in the sample-test conversation to justify a deep page, it moves up into the covered-applications section above.
Every application above routes into one of the four process lines below. When the application isn't yet documented as its own page, the process page is where to start reading.
Low-distortion joints on thin walls and heat-sensitive parts. See the line →
Filler-added joints, repair build-up and cosmetic weld visibility. See the line →
Tab, terminal and wire production joints where current passes through both sides. See the line →
Permanent identification, DataMatrix and QR, compliance marks. See the line →
Send us the application: material, joint geometry, volume expectation, and any downstream chemistry the weld has to survive. A process recommendation and sample-test proposal come back. The evaluation itself is free.
Send us the application