Equation 11 · Part 1 · When the Substrate Became the Product
Symbol C_fix
What this part means
ix is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
ix is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol C_fix→Article meaning
The passage around this formula
Within its range of validity, the model explains the entire strategy of advanced packaging. Shorten and you reduce the wire term. Reduce the connector pitch and you shrink per wire while getting more wires per millimetre of die edge, so you can lower the per-wire data rate for the same aggregate bandwidth — and a lower rate lets you drop the swing and delete the equalisation circuitry. The gains compound, which is why the reported numbers for short-reach parallel interfaces are so far below what a long-reach serial link costs.
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 →
See this notation across published equations →
Sources cited in the article section
These citations provide research context; check each source for the exact claim it supports.