Build-to-print manufacturing for unique geometries.

Custom stamped components for lids, frames, shims, thermal pads, and package interfaces when standard catalogs cannot solve the requirement.

When standard catalogs stop, tooling begins.

Qualified stock
Tooling and stamping
Package-ready components

Sanjin works from qualified material stock and focuses its engineering work on tooling, forming behavior, dimensional control, plating compatibility, and repeatable stamped output. For designs that do not fit standard catalogs, this is where drawings become manufacturable packaging components.

Stamped forms we support.

Lids & Covers

Stamped cover structures for hermetic and high-reliability package interfaces.

Forms

Flat, stepped, folded, dimpled, deep-drawn covers

Materials

Kovar, Alloy 42, stainless steel, qualified metal stock

Controls

Flatness, burr, edge condition, plating surface

Package match

Parallel seam welding, laser welding, soldering interfaces

Frames & Rings

Package frames, sealing rings, support frames, and custom openings for package assembly.

Forms

Open frames, rings, windows, support structures

Materials

Kovar, Alloy 42, copper alloys, stainless steel

Controls

Opening geometry, flatness, edge quality, dimensional repeatability

Package match

Hermetic assemblies, ceramic packages, custom package interfaces

Lead Frames

Stamped lead frame structures for package connectivity and high-volume assembly formats.

Forms

DIP, SOP, matrix formats, high-density frame layouts

Materials

Copper alloys such as C194 and C7025, qualified lead frame stock

Controls

Coplanarity, pitch, burr control, handling stability

Delivery

Tape and reel, trays, project-specific packaging formats

Shims & Transition Pads

Precision pads, shims, interposers, and bimetal transition pieces stamped from qualified stock.

Forms

Shims, micro-coins, thermal pads, copper-aluminum transition pads

Materials

Copper alloys, stainless steel, bimetal stock, application-specific metal stock

Controls

Thickness, flatness, edge condition, bonding surface handling

Use cases

Bonding transitions, thermal interfaces, spacing, package support

What must be controlled before volume stamping.

Coplanarity

Lead frames and package interfaces must remain stable enough for downstream assembly and automated handling.

Burr and edge condition

Edges, openings, and stamped profiles must be controlled to reduce assembly risk and protect functional surfaces.

Warpage

Forming, plating, and handling conditions are reviewed to reduce distortion in thin or complex metal features.

Thickness and forming consistency

Material stock, forming paths, and die conditions must support repeatable geometry across production lots.

Plating interface

Sealing, soldering, bonding, and contact surfaces must match the package process and downstream requirements.

Tape and reel readiness

Carrier format, orientation, inspection flow, and handling stability are considered before high-volume delivery.

From CAD review to production-ready delivery.

Each custom stamping program is planned around the part geometry, application interface, expected volume, and the level of tooling needed to support repeatable output.

  1. Review

    We review drawings, material stock, target volume, assembly method, and package interface requirements before quoting the manufacturing path.

  2. DFM feedback

    Geometry, openings, bends, thickness, burr risk, plating surfaces, sealing areas, and key tolerances are reviewed for stamping feasibility.

  3. Scale-matched tooling

    Tooling is planned around project stage and production scale. High-volume lid programs may justify automated tooling, while lower-volume or early-stage programs can follow a more flexible tooling route.

  4. Sample and FAI

    Samples and first article inspection confirm dimensions, flatness, edge condition, visual requirements, and critical functional surfaces before ramp-up.

  5. Pilot or production run

    The approved tooling route moves into pilot or volume stamping, with attention to coplanarity, warpage, burr control, and lot-to-lot consistency.

  6. Inspection and packaging

    AOI / CCD inspection and project-specific packaging such as Tape & Reel, trays, bulk, or clean handling prepare parts for downstream assembly.