IN Brief:
- Applied entered an agreement to raise its Besi stake to around 20%.
- The partners already collaborate on hybrid bonding and advanced packaging.
- The purchase remains subject to the relevant US antitrust waiting period.
Applied Materials has entered an agreement to increase its strategic holding in Dutch semiconductor equipment manufacturer Besi to approximately 20%, extending a relationship focused on advanced chip packaging. The companies already collaborate on hybrid bonding and other integration methods. Applied previously held around 9%, but the additional purchase is subject to the relevant US antitrust waiting period.
It should therefore be reported as an agreed investment, not as a completed acquisition or a takeover of Besi. The new shareholding development is distinct from their earlier research-and-development partnership.
Advanced packaging has become a major performance constraint as high-performance computing designs rely on multiple chiplets and dense memory interfaces. A processor’s effective capability depends increasingly on moving data efficiently among different dies, rather than improving transistor performance alone. Conventional solder interconnects can limit the pitch at which these connections can be made. Hybrid bonding attempts to form fine-pitch electrical and mechanical connections between precisely prepared surfaces, creating possibilities for denser die-to-die links.
The manufacturing challenge is demanding. Wafers or dies must be handled without unacceptable particles or contamination, their surfaces must be prepared correctly and their patterns aligned to tight tolerances. A defect that could be tolerable in a comparatively coarse package may be catastrophic for a dense array of connections. Inspection and metrology therefore become integral to the bonding process, and equipment suppliers must balance accuracy, throughput, process stability and maintenance demands.
Applied Materials provides semiconductor manufacturing and materials-engineering equipment, while Besi has specialist advanced-assembly and bonding expertise. Their collaboration brings together process steps that can be difficult to optimise separately. Improvements to surface preparation and bonding equipment can influence yield across a complete manufacturing line. However, the existence of joint development work does not show that every proposed packaging process has reached qualified high-volume production or that customers will adopt a particular tool configuration.
An increased financial stake may give Applied greater exposure to an equipment segment expected to expand with chiplet adoption. It also changes the commercial relationship between two suppliers working in connected parts of semiconductor manufacturing. Customers will pay attention to equipment interoperability, support commitments and whether collaboration accelerates production readiness. The investment does not remove competition from the broader advanced-packaging market, and the terms should not be treated as evidence that alternative technology routes have been displaced.
Semiconductor packagers typically evaluate new bonding tools against production-line metrics: alignment accuracy, defect rates, maintenance intervals, cycle time and cost per good assembled device. Demonstrations of very fine pitch can be technically impressive yet economically unattractive if yield is poor. Reliability under thermal cycling and long operating life must also be assessed after assembly. The central question is whether process improvements survive the transition from controlled development experiments to repeatable manufacturing with varying incoming wafers and dies.
The wider advanced-packaging supply chain includes wafer thinning, temporary bonding, cleaning, metrology and handling systems, and each stage can affect what a hybrid-bonding process achieves. Better placement accuracy is only useful if the incoming surfaces meet the necessary preparation standards. Packagers are therefore likely to evaluate connected process flows rather than isolated equipment specifications.
Applied and Besi’s closer relationship may provide opportunities for such integration, but claims of improved manufacturing yield or customer adoption will require results from actual production lines rather than inferred benefits from their ownership link. Investigators should also separate gains attributable to alignment equipment from those resulting from changes elsewhere in the manufacturing flow, including surface treatments and cleanroom controls.
The pending transaction sharpens an existing strategic alignment at a time when chiplet packaging is becoming more important to computing performance. The investment’s completion depends on regulatory timing, while its industrial effect will be measured in production-ready bonding processes and equipment orders. For chipmakers, a higher shareholder stake is less important than whether the equipment can deliver the fine-pitch connections, throughput and yield needed for commercial packages.
