Equation 13 · Part 3 · Patterning at the Limit: What Actually Happens When a Chip Is Manufactured
subscript
subscript
What this part means
The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.
Its job in the formula
A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.
Full expression→subscript→Article meaning
The passage around this formula
The vendor and research-institute case for higher numerical aperture is built on the same arithmetic. imec assesses that for critical metal layers at its A14 and A10 nodes, 0.33 numerical aperture requires three to four masks where 0.55 accomplishes the layer in a single exposure, and that certain DRAM layers requiring at least three masks today would need one [ 12 ] . That is imec’s assessment, not a measured production result, and it should be read as such. ASML’s own product pages state 13 nm resolution for the 0.33 aperture platform and 8 nm for the 0.55 platform [ 7 ] — figures that correspond to 0.32 in both cases, which is a consistency worth noticing rather than a…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
Sources cited in the surrounding passage
- [12] The case for High NA EUV: unlocking the next era of chip manufacturing ↗
- [7] EUV lithography systems ↗
These citations provide research context; check each source for the exact claim it supports.