Two custom silicon wins are entering the revenue phase for Qualcomm (QCOM). The company's CEO confirmed that both deals are expected to begin generating revenue in the December quarter, with wafer production already under way. What complicates the clean read: the wins are few in number, and the distance between wafer starts and recognized revenue is where custom chip programs most often slip.
What the production milestones mean
Tape-out is the point at which a chip design is locked and delivered to a fabrication facility. Qualcomm said it has completed the tape-out of HBC Gen 1, moving that program past design and into manufacturing validation. The "Gen 1" designation suggests iteration is expected to follow. Separately, wafer production for its custom silicon business has commenced. Together, the updates place Qualcomm inside an active production cycle. For a custom silicon program, in which each chip is designed to a single customer's specifications, wafer starts signal that qualification is close. Tape-out completion and production commencement are distinct milestones; having both in the same disclosure narrows the remaining distance to shipment.
The revenue test
The December quarter is Qualcomm's stated window for both wins to begin contributing. The CEO described them as near-term. Two programs expected to book revenue in the same quarter suggests the ramp-up is proceeding on roughly parallel timelines. The starting point for revenue is a low bar: it does not imply volume production, only that the programs have crossed the threshold from development to commercial delivery. Neither the customers nor the volumes were disclosed.
The counterargument
Two wins is a thin base for a custom silicon business. These programs require tight co-development with a single customer. Qualification cycles are long, and yield performance only reveals itself once production runs. The risk is that friction in customer qualification or fab yield pushes one or both programs out of the December window. Without customer names, external verification of the timeline is limited.
On balance
The physical evidence is real: HBC Gen 1 tape-out is complete, wafer production has started, and the CEO has put December quarter revenue on record. The line to watch is whether both wins show up in Qualcomm's December quarter results.