Density shows you how people use your space and helps you get more out of every square foot. Backed by Kleiner Perkins and South Park Commons.
About the role
Own the thermo-mechanical design of the advanced packages our AI accelerator silicon ships in. A multi-die 2.5D package is a stack of materials that all want to expand at different rates, under a lid, under load, cycling through hundreds of watts — and your job is to make it stay flat, stay bonded, and stay intact.
What they're looking for
- 8+ years of packaging mechanical experience on high-performance designs, including 2.5D / 3D and multi-die packages (CoWoS, EMIB, InFO, fan-out, or equivalent) and HBM-bearing assemblies
- Hands-on with industry-standard FEA tools (Ansys Mechanical, Abaqus, or equivalent) and strong materials knowledge across underfills, mold compounds, substrates, TIMs, and lid materials
- Demonstrated ability to work closely with packaging, thermal, reliability, board, and OSAT partners to converge mechanical designs and sign them off against JEDEC and IPC standards
More about this role
Own the thermo-mechanical design of the advanced packages our AI accelerator silicon ships in. A multi-die 2.5D package is a stack of materials that all want to expand at different rates, under a lid, under load, cycling through hundreds of watts — and your job is to make it stay flat, stay bonded, and stay intact. You'll model warpage and stress through reflow and assembly, design the lid, stiffener, underfill and TIM stack that controls them, set the mechanical rules our OSATs build to, and own the socket and load mechanics where the package meets the cooling solution. You'll correlate every model against real measurement, and you'll be the person who knows whether a design will survive the assembly line before it gets there.
- Own thermo-mechanical modeling and FEA for multi-die packages; warpage across reflow and assembly, die and interconnect stress, CTE mismatch, and structural response under thermal and mechanical load
- Own package mechanical design; lid and heat spreader, stiffener, underfill and mold compound selection, and TIM specification and bondline control at the package-to-cooling interface
- Drive assembly process mechanics and mechanical design rules with OSATs...
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