# Making Tiny Chip Patterns with Special Metal-Filled Ink > This patent describes a new light-sensitive material, called a resist, that uses special multi-metal complexes to create incredibly small patterns on computer chips using extreme ultraviolet light. - **Patent:** US 10825684 - **Original title:** Material composition and methods thereof - **Owner:** Taiwan Semiconductor Manufacturing Co TSMC - **Granted:** 2020 - **Status:** Active - **Times cited:** 0 - **Field:** semiconductors, consumer_electronics, telecommunications, materials ## What it does The patent outlines a method for creating microscopic patterns on a substrate, which is the base material for computer chips. First, a resist layer is formed over the substrate (Claim 1). This resist layer is unique because it contains 'metal-containing nanoparticles' that are specifically 'multi-metal complexes.' These complexes have an 'extreme ultraviolet (EUV) absorption element' (like antimony, Claim 5) and a 'bridging element' (like ruthenium, Claim 5) that connects different metal atoms. When EUV light hits the resist, a chemical change occurs: a 'first ligand' (a molecule attached to the metal complex) that couldn't connect with other complexes is replaced by a 'second ligand' that *can* participate in a 'cross-linking reaction' (Claim 1). This cross-linking process makes the exposed areas of the resist harder. Finally, a development process washes away the unexposed, softer parts, leaving behind a precise, patterned resist layer (Claim 1). For example, this process could be used to define the incredibly fine circuit lines for the transistors in a smartphone processor. ## What it does NOT cover - Resist materials that do not contain multi-metal complexes, as the claims specifically require a 'multi-metal complex' (Claim 1). - Methods that use light sources other than extreme ultraviolet (EUV) for exposure, as the resist includes an 'EUV absorption element' (Claim 1). - Resist materials where the metal atoms within the complex are not separated by at least one ligand (Claim 1 specifies 'each metal atom... separated... by at least one ligand'). - Processes where the exposure does not cause a ligand replacement that enables cross-linking (Claim 1 details 'first ligand... replaced by a second ligand... configured to participate in the cross-linking reaction'). - Resist materials that are chemically amplified resists (CARs), as the patent specifically mentions a 'non-chemically amplified resist (non-CAR) layer' in some embodiments (Claim 12). ## The clever bit The novelty lies in using a specific multi-metal complex within the resist. This complex has distinct elements for absorbing EUV light and for bridging, along with a clever mechanism where EUV exposure triggers a ligand swap, directly enabling cross-linking. This allows for very precise patterning without needing additional chemical amplification. ## Real-world examples 1. Manufacturing of advanced logic chips (CPUs, GPUs) 2. Production of high-density memory chips (DRAM, NAND) 3. Fabrication of components for 5G telecommunications 4. Next-generation smartphone processors 5. High-performance computing components ## Why it matters This patent is crucial for the ongoing advancement of semiconductor manufacturing. Extreme Ultraviolet (EUV) lithography is the leading technology for creating the smallest features on advanced microchips, enabling more powerful and energy-efficient devices. Developing better resist materials, like the one described, is essential for pushing the limits of EUV technology, allowing chipmakers to continue shrinking transistors and improving performance. Without such innovations in materials, the progress of Moore's Law, which predicts the doubling of transistors on a chip every two years, would slow down significantly. ## Frequently asked questions ### What does Making Tiny Chip Patterns with Special Metal-Filled Ink cover? This patent describes a new light-sensitive material, called a resist, that uses special multi-metal complexes to create incredibly small patterns on computer chips using extreme ultraviolet light. ### Who owns patent US 10825684? Taiwan Semiconductor Manufacturing Co TSMC owns this patent, granted in 2020. ### When does this patent expire? This patent is expected to expire on January 6, 2037, when the invention enters the public domain. ### What problem does this patent solve? This patent is crucial for the ongoing advancement of semiconductor manufacturing. Extreme Ultraviolet (EUV) lithography is the leading technology for creating the smallest features on advanced microchips, enabling more powerful and energy-efficient devices. Developing better resist materials, like the one described, is essential for pushing the limits of EUV technology, allowing chipmakers to continue shrinking transistors and improving performance. Without such innovations in materials, the progress of Moore's Law, which predicts the doubling of transistors on a chip every two years, would… ### What does this patent NOT cover? Resist materials that do not contain multi-metal complexes, as the claims specifically require a 'multi-metal complex' (Claim 1). **Full plain-English explainer:** https://patentbrief.org/patent/us/10825684/material-composition-and-methods-thereof **Original patent:** https://patents.google.com/patent/US10825684 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [How to Clean Tiny Chip Patterns Using a Special Chemical Developer](https://patentbrief.org/patent/us/10866511/extreme-ultraviolet-photolithography-method-with-developer-composition) — This patent describes a method for making advanced computer chips using extreme ultraviolet light and a special chemical developer that cleans away tiny metal leftover bits from the chip's patterns. - [Making Microchips with a Silicon-Containing Photoresist Layer](https://patentbrief.org/patent/us/10281819/silicon-containing-photoresist-for-lithography) — This patent describes a method for precisely creating tiny patterns on microchips using a special light-sensitive material, called a photoresist, that contains silicon and changes its properties when exposed to light. - [Making Tiny Chip Patterns Using Gas and Light](https://patentbrief.org/patent/us/10514610/lithography-patterning-with-a-gas-phase-resist) — This patent describes an advanced machine that uses a special gas and patterned light, like a tiny stencil, to draw incredibly small features directly onto a silicon wafer for making computer chips. - [How to Clean Metal Off Wafers After EUV Chipmaking](https://patentbrief.org/patent/us/20250172879/metal-compound-removing-solvent-and-method-in-lithography) — This patent describes a specialized system and cleaning fluid used to precisely remove tiny metal bits from silicon wafers after they've been patterned using extreme ultraviolet light for making advanced computer chips. - [How a Special Coating Stops Materials from Sticking](https://patentbrief.org/patent/us/12740286/nucleation-inhibiting-coating-containing-rare-earth-compounds-and-devices) — This patent describes a device with a special coating, made with rare earth elements, that prevents other materials from sticking to it, allowing for precise material placement on other surfaces.