New semiconductor startup TYLsemi launches with $43M funding for custom chiplet-based processors

A new semiconductor firm, TYLsemi (pronounced "Tile Semi"), publicly revealed itself this month, alongside $43 million in early-stage funding and an ambitious plan to simplify the development of custom processors for AI infrastructure.

Dozens of contract chip designers can develop custom processors of varying complexity. However, only a few companies can offer custom silicon design services using standard chiplets to speed up and de-risk the development cycle. TYLsemi aims to join their ranks. We spoke to their founders to find out how the nascent business might pull it off.

Emerging from Stealth

Rather than compete solely as another custom ASIC design house, TYLsemi intends to offer reusable, standards-based connectivity, power delivery, and eventually memory chiplets that customers can combine with their own differentiating compute silicon to build a unique system-in-package.

For companies that do not intend to conduct semiconductor development themselves, TYLsemi will also provide an end-to-end service that includes:

• Design and implementation of a differentiating chiplet
• Packaging
• Qualification
• High-volume production

This approach essentially enables companies without any silicon development skills to offer their own multi-chiplet processors.

(Image credit: TYLsemi)

TYLsemi was co-founded by Mohit Gupta and Sunil Bhardwaj, semiconductor veterans who have led global engineering, operations, and business teams at Alphawave, SiFive, Cadence, Rambus, and other chip companies. They collectively have extensive experience with both standard and custom silicon.

Mohit Gupta, co-founder and CEO of TYLsemi, believes the time is right to establish a company specializing in pre-approved chiplets and custom ASIC design.

"Chiplets have been discussed for seven or eight years, but several things have changed in the last three or four years," Gupta told Tom's Hardware Premium.

Key changes cited by Gupta:

1. Advanced packaging has matured significantly. There are now multiple 2.5D and 3D integration options in volume production. Customers are not limited to one packaging technology or supplier; options exist from foundries and OSATs, including TSMC, Intel, ASE, and Amkor.

1. Die-to-die standards have arrived. In the past, most chiplet implementations relied on proprietary interfaces. UCIe is now moving into production deployments, including at hyperscalers, which makes heterogeneous integration much more practical.

1. Supply-chain resilience has become critical. Customers increasingly want modular and potentially multi-source strategies rather than a single point of failure.

"Those factors have created an environment that did not exist four or five years ago," Gupta said.

AI Accelerators as Primary Application

AI accelerators will be among the primary applications to benefit from multi-chiplet design, as we have already learned from AMD and Nvidia.

"The AI accelerator market is on track to reach $604 billion by 2033, and custom silicon XPUs built for specific hyperscaler workloads are the fastest-growing segment," Gupta said.

"At that scale, chiplet-based design is no longer optional, yet there is no pure-play chiplet company serving this market with a full portfolio. TYLsemi closes that gap with standards-based chiplets combined with UCIe-based die-to-die connectivity, XPU-aware design, packaging, and integration — giving customers a fast, proven path to AI-era silicon."

Chiplet Economics

The vast majority of AI and HPC accelerators today feature large die sizes, in many cases approaching the size of a reticle. However, as modern process technologies become more complex, foundries tend to increase their quotes for new nodes.

• A leading-edge wafer used to cost around $15,000 to process approximately five years ago.
• Today, that price is around $30,000.

As a result, large chips at a size close to the reticle limit implemented on a leading-edge node become an option for only a select few chip designers who can afford it. For newcomers, multi-chiplet designs enabled by advanced packaging and standardized interconnects such as UCIe start to make much more sense.

(Image credit: TYLsemi)

"Once dies get into the 500–600 mm² range, the yield curve becomes increasingly difficult. Timing closure on a reticle-sized die is also challenging," Gupta explained. "I have worked on a reticle-sized accelerator, and getting from 99% to the final 1% can require disproportionately more engineering effort."

Cost Comparison: Monolithic vs. Chiplet Approach

TYLsemi estimates that its chiplet approach could reduce total cost of ownership by 57% at a volume of 100,000 devices:

| Approach | Die Size / Configuration | Total Cost | Unit Price | |---|---|---|---| | Monolithic | 700 mm² 3nm-class chip | $350 million | $3,000 | | Chiplet SiP | 500 mm² 3nm-class compute die + four 100 mm² I/O chiplets (N-1 process) | $150 million | ~$600 |