A published US patent application assigned to ASML NETHERLANDS B.V. describes a piece of equipment that does not sit in the part of the fab the company is best known for. US20260206525A1, titled RECESS-BASED PICK AND PLACE FOR HETEROGENEOUS INTEGRATION, published on July 16, 2026 with five named inventors and is classified under CPC codes H10P 72/0446, H10P 72/0606, H10P 72/53 and H10P 72/7622. It is an A1 publication, which means a pending application: published, examined or not, and not granted.

The commercial frame is worth stating plainly. ASML's revenue base is lithography scanners, tools that pattern the front end of the wafer. Die placement is a back-end operation, the step where finished dies are transferred onto a receiving wafer or substrate to build a multi-die package. An application directed to a die-placement apparatus is therefore a filing in an adjacent room of the same building, and the title says which room: heterogeneous integration, the assembly of separately fabricated dies into one package.

What claim 1 is directed to

Claim 1 is an apparatus claim with three recited elements. The first is a stage carrying a plurality of recesses, each configured to accept a donor die. That is the structural departure the title advertises. Rather than a pick head that carries and aligns one die at a time, the dies sit parked in machined pockets. The second element is a second stage comprising a support for one or more targets. The third is a measurement system, functionally coupled to the first stage.

The measurement system carries the weight of the claim. As recited in claim 1, it is configured to obtain the locations of the donor dies sitting in the recesses; to obtain locations of the one or more targets; based at least on those obtained locations, to provide output signals that adjust the die locations to correspond to the obtained locations of the targets; and then, based on the adjusted locations, to place the dies on the targets by relative movement between the two stages. Both sides of the transfer are measured, and the alignment is measured-to-measured.

That last point matters for anyone reading the record rather than the summary. The abstract of the application, which is background description rather than a statement of what is claimed, does not recite the step of obtaining the locations of the targets at all. It moves directly from obtaining the donor-die locations to adjusting those dies to correspond to locations of the one or more targets. Statements about what this application claims should be sourced to the claims, where the target-measurement step is expressly recited.

The application contains 21 numbered claims, of which claim 9 is canceled, leaving 20 operative. The dependents fill in the mechanism rather than the strategy. Claims 2 through 5 place adjustable stages inside the recesses and specify actuation, with claim 4 reciting piezoelectric activation and claim 5 reciting adjustment with respect to six degrees of freedom. Claims 6 through 8 build out the metrology: an imaging device and a processor that determine die locations from two-dimensional or one-dimensional photodetector images using edge, corner and orientation features of the dies and the recesses. Claim 12 adds electrostatic clamps that hold the dies in their pockets and release as the stages close. Claim 15 is the parallel method claim, and claim 19 adds a voltage applied between the dies and the target locations to assist alignment at the moment of placement.

The throughput read

The claim that most directly addresses production economics is claim 21, a method dependent that describes running two populations of dies through the machine at once.

wherein the first stage comprises multiple sets of recesses and wherein, when the first stage is in the first position, a first set of recesses is configured to accept a first plurality of donor dies and a second set of recesses is configured to allow optical measurement of the locations of a second plurality of donor dies— RECESS-BASED PICK AND PLACE FOR HETEROGENEOUS INTEGRATION, US20260206525A1

Read against claim 1, that describes a pipeline: one set of recesses is being loaded while another set is being measured. The architecture the claims describe amortizes the metrology step across a batch instead of paying it once per die on a serial pick head, and it collapses the transfer itself into a single relative movement between two stages. Whether that translates into a competitive tool is not something the document settles. What the document does establish is that the disclosed approach treats placement accuracy as a measurement-and-stage problem rather than a handling problem, which is the same problem decomposition ASML applies to overlay in a scanner.

The cohort supports that reading. Eight other applications assigned to the company published the same day, nine records in all counting the hero, and they cluster around measurement and precision motion. They include US20260202761A1 on a metrology system based on multimode optical fiber imaging, US20260202760A1 on a dispersion engineered beam modifier for a metrology system, US20260202766A1 on determining reticle deformations, US20260203875A1 on generating a denoising model, and US20260204466A1 on an actuation stage and electromagnet apparatus. The last of these is the closest mechanical sibling to the hero's adjustable in-recess stages. The company's records are indexed under several casing variants of the assignee name, including ASML NETHERLANDS B.V. and ASML Netherlands B.V.; these are the same legal entity.

For readers tracking where advanced-packaging capacity constraints get addressed, the signal in US20260206525A1 is directional rather than financial. There is no revenue, no capex line and no customer here. There is a pending application in which a lithography-equipment company describes a back-end assembly tool built out of the front-end toolkit it already owns: stages, optical metrology, electrostatic clamping and closed-loop position correction. The claims are the operative text, and they are still pending.