Rick Lenssen works as a data analyst at the Dutch company ASML and builds Lego models on the weekends. It could have remained there, a mere hobby shared with his children if the company that employs him did not design and manufacture the lithography machines necessary to produce microchips, one of the key elements of current technology and one of the key suppliers of TSMC, Samsung or Intel. Now, his Lego designs imitating the original machines reach four-digit figures on eBay.
380 million in 851 pieces. It appeared in the ASML online store at the end of November 2024: a Lego model called TWINSCAN EXE:5000, measured 35 centimeters long and cost $227.95. It reproduced the high numerical aperture extreme ultraviolet (High-NA EUV) lithography machine that the company delivered to Intel in late 2023 and that allows chips to be printed from its 2 nanometer node. The actual equipment weighs 165 tons, has more than 100,000 parts and had to be transported in three Boeing 747s.
The Lego set reproduced it in the style of the popular toy brand, it included a purple ray that represented ultraviolet light and a minifigure with the full clean room suit that technicians wear. The product sheet, perhaps anticipating what was to come, already warned that multiple orders from the same customer would be cancelled.
Brick Lenssen. This is the nickname given to Rick Lenssen, a 39-year-old company employee who became interested in Legos. by chanceafter taking his children to a toy fair in the Netherlands. His first personal project was an exact replica of the ASML campus in Veldhoven: two years of work, 2,500 euros out of his pocket and 25,000 pieces, with details as obsessive as the peregrine falcon that nests on a roof of the complex, accompanied by a pigeon that, according to him, acts as food. He designed everything first on the computer and assembled it in the attic of his house.
Where do I put this. Lenssen then encountered a drama that will be familiar to any Lego fan: what to do once you finish building the set. He offered it to the campus itself, but they didn’t want it. Lenssen wrote to ASML’s CEO on a Friday night, and within hours he wrote back saying he loved the set. To get the model out of the attic, it had to be dismantled piece by piece (like the real ASML machines), and company workers loaded it into a van. Today it is the first thing visitors see when they arrive at the company’s reception.
It’s official. The jump to merchandising officer arrived later, with a model of the skyline of the campus in charge of promoting an internal app, and then the two models of machines. He was not the first: Jeroen Ottens, an ASML engineer who had worked at Lego, I had modeled a previous version. The cheapest model in the current range, the TWINSCAN NXE:3400C, at $166.70, was not born as a commercial product either: it started as internal training tool before becoming a special edition open to the public. It took Lenssen a few weeks to design the current two sets, one with a 61-page instruction manual. Your only compensation is a copy of each model.
Employees only. The sales policy is one unit per person and verified ASML email is mandatory. For weeks, some fans managed to place orders bypassing that restriction due to a security hole in networks, and measures had to be taken: in December 2024 ASML began canceling orders from buyers without an actual corporate email. The EXE:5000 file even disappeared and can only be consulted today through the Wayback Machine. The same corporate email restriction covers the rest of the merchandising of the company, yes, much less coveted: sweaters, mugs, pins and Christmas decorations.
eBay fever. Of course, speculation was not long in coming, as It usually happens with Lego sets that disappear from the market. Individual sets of those designed by Lenssen have been seen for $600, while the complete collection reaches $4,500. Before closing that section of the store, ASML sold 1,355 units of the latest model (there are 44,000 company employees, possibly not all of them interested in building with toy blocks). Although the comparison is absurd, only six of the real machine have been sold.

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