The assignee ranking for this dataset covers 26 companies across 49 records, with the leading five together holding 57.1% of all records and the leading ten holding 73.5%. The single leading assignee holds 10 records, meaning even the top position accounts for a minority of total filing activity. Names in the ranking span automotive OEMs, industrial electronics majors, research institutes and universities, reflecting that packaging innovation here is not confined to chip makers alone. Because the tail runs to single-filing entrants at rank ten, the field still has room for narrowly scoped new entrants.

Filing activity peaked at 8 records in 2022 and had fallen to 4 by 2024, a 33% decline over that three-year span, which is the most recent period this dataset treats as complete. Publication typically lags filing by around 18 months, so the lower counts shown for 2025 and 2026 understate real filing activity rather than confirming a further drop. Taken together, the honest read is a cooling from a 2022 peak rather than an ongoing slide. Anyone using this trend for planning should wait for another publication cycle before treating 2025-2026 as confirmed data.

IPC composition shows H01L (semiconductor devices) on 69.4% of the 49 records, while H05K (printed circuits and assemblies) appears on only 22.4%, despite the search being built around packaging and encapsulation terms. That gap indicates most inventors are still anchoring claims in device structure rather than in dedicated packaging or assembly language. A claim drafted primarily around printed-circuit-level packaging structure, rather than the underlying device, may face a thinner layer of directly competing prior art. This is a claim-drafting observation, not a guarantee of allowance, and should be checked against a fresh full-text search before filing.

China accounts for 21 of the tracked records, well ahead of the United States at 11 and the EPO at 9, with smaller counts filed in Austria, Japan and Canada. This split suggests that competitive intelligence and freedom-to-operate work focused only on the United States or Europe will miss the largest single bloc of activity. Companies planning to manufacture or sell power modules into the Chinese market should treat the Chinese filing record as the primary reference set, not a secondary check. The receiving-office split also hints at where litigation or opposition risk is most likely to originate.

EP2733743B1, granted to Mitsubishi Electric in March 2022, covers a power semiconductor module construction addressing interconnection and housing around a wide bandgap power stage. It is representative of a recurring claim style in this dataset: a semiconductor device claim wrapped in a specific mechanical and thermal packaging arrangement, rather than a packaging structure claimed independently of the device. Whether it blocks a specific new design depends on whether that design's interconnection and housing geometry falls within the claim's specific limitations, which requires a claim-by-claim comparison rather than a landscape-level read. Treat this record as a starting point for freedom-to-operate review, not a final answer.