Skip to Content

Advanced Packaging

Bond, attach, integrate.

Die attach, flip chip, wire bond, hermetic, and 3D heterogeneous integration — from R&D through production-intent, on US soil. One engineering team owns the process from first build to repeatable yield.

/ Placement ±2.5µm @ 3σ / MIL-STD when required / ITAR-aware / US-soil

Multi-chip flip-chip module assembled at Heisler Semiconductor

What we do

Five attach and interconnect families, under one roof.

Wafer handling 2″ to 12″. Placement to ±2.5µm at 3σ on BESI Datacon and Tresky platforms. The recipe set covers most die-to-substrate problems — the rest we develop.

Hermetic sealing · fluxless / vacuum reflow · mixed-die stacks · panel-level builds. Full process windows and design rules available under NDA.

  • 01Die attach & dispense — automated dispense, dip & stamp; conductive and non-conductive adhesives
  • 02Bonding methods — epoxies, fluxless and vacuum reflow, thermocompression, ultrasonic, ACA/ICA
  • 03Flip chip — C4 solder ball, C2 Cu-pillar, Au stud; capillary and no-flow underfill
  • 04Wire bond — ball and wedge, fine pitch
  • 053D heterogeneous integration — die-to-wafer, die-to-die, die-to-substrate, die-to-PCB

The first build is easy. The hundredth is the job.

A package that works once tells you nothing. We develop the attach process so it holds across lots — controlled placement, controlled bondline, controlled void rate — then prove it before you commit to volume.

New geometries break old recipes: thinner die warp, finer pitch shorts, mixed-CTE stacks crack on the first thermal cycle. We treat each as an engineering problem — define the objective, build a test vehicle, run the AI-assisted DOE, validate with real metrology — so the failure mode shows up on a coupon, not in your field return.

Materials & applications

Hard substrates, fine pitch, high reliability.

Silicon, sapphire, AlN, and polyimide; conductive and non-conductive adhesives and underfills. Built for work that has to survive thermal cycling and screening.

Stacked-die 3D heterogeneous integration package built at Heisler Semiconductor

Aerospace
& Defense

Hermetic · traceable · US-soil

Medical
& Bio

MEMS · sensors · panel-level

RF /
mmWave

Fine-pitch · Cu-pillar · multi-die

Advanced
Sensors

3D stacks · mixed-die · underfill

Proof, from real builds

>900

Bumps in a single flip-chip package · 100% yield

4,000+

MEMS assemblies · panel-level · 100% yield

±2.5µm

Placement accuracy @ 3σ · BESI Datacon · Tresky

Die-level package inspected for bond integrity at Heisler Semiconductor

Full design rules, process windows, and build data available under NDA.

How we qualify

Every build leaves evidence.

01   Cross-section — bondline, voiding, intermetallics
02   X-ray — void mapping and joint integrity
03   Shear & pull — die attach and wire bond strength
04   Thermal cycling — to MIL-STD or customer spec
05   Hermetic test — seal integrity where required
06   Documentation & change control

Qualification to MIL-STD or your spec — bond integrity verified, not assumed.

We close each process with metrology and reliability data, then document the window and change control so the result transfers cleanly to production-intent. Cross-section and x-ray detail lives with inspection & metrology; dicing and singulation with laser micromachining; RDL and TSV with wafer-level.

Process More.

Bring us the package
that won't yield yet.

One team, design review through volume. Request a capability brief for design rules, full process detail, and build data under NDA.

Request a Capability Brief

/ US-soil / ITAR-aware / MIL-STD