A custom ASIC requires a significant upfront investment, so understanding the economics is an important part of deciding whether it is the right solution. The business case is largely determined by two factors: the Non-Recurring Engineering (NRE) cost and the unit cost in mass production.
NRE: The Investment Behind a Custom ASIC
NRE, or Non-Recurring Engineering, covers the one-time costs of developing an ASIC and bringing it into production. This includes the design and verification work, prototyping, qualification, and the activities required to deliver a reliable, production-ready device.
Because NRE is a fixed investment, its impact on the cost of each chip depends heavily on production volume. The larger the number of chips produced over the lifetime of a product, the more the initial investment is spread across individual units.
This is one of the fundamental economic advantages of ASIC development: a higher production volume can significantly reduce the effective NRE cost per chip.
What Determines the Unit Cost?
Once an ASIC enters mass production, the economics are driven primarily by its unit cost. Three factors have the greatest influence: silicon area, packaging, and testing.
Silicon Area and Yield
ASICs are manufactured on large silicon wafers, typically 8 or 12 inches in diameter. The smaller the die, the more individual chips can be produced from a single wafer. Since the cost of the wafer is distributed across all the usable dies, reducing die area can lower the cost per chip.
Yield is equally important. Not every die on a wafer will necessarily meet the required specifications. A higher yield means more good chips are obtained from each wafer, which further reduces the effective silicon cost per unit.
For this reason, die size and manufacturing yield are key factors in ASIC cost optimization.
Packaging and Testing
Manufacturing the silicon is only part of the process. Each die must also be packaged into its final component form and tested to ensure that it meets the required electrical and functional specifications.
Testing may take place both at wafer level and after packaging. The associated costs depend on the complexity of the device and the level of testing required. In high-reliability markets such as automotive and medical electronics, qualification and testing requirements can have a particularly significant impact on the final unit cost.
The Impact of Production Volume
Production volume has a direct impact on the overall economics of a custom ASIC.
At higher volumes, the fixed NRE investment is distributed across more units, while manufacturing can also become more cost-efficient. Wafer, packaging, and production costs may decrease as volumes increase and manufacturing processes become more streamlined.
As a result, the cost per chip generally decreases as production volume increases.
This makes volume an important consideration when evaluating a custom ASIC. A solution that may not be economically attractive at low volumes can become highly competitive when the expected lifetime production volume is sufficiently large.
Typical ASIC Unit Costs
At ICsense, we’ve seen mass-production unit prices ranging from around $0.10 to several dollars per chip. The actual price varies considerably depending on the application, semiconductor technology, die size, packaging, testing requirements, and production volume.
The unit price, however, is only one part of the equation.
Looking Beyond the Unit Price
The value of a custom ASIC comes from more than manufacturing cost alone. By designing the chip specifically for an application, it can be optimized for factors such as performance, power consumption, size, functionality, and system integration.
The business case therefore comes from balancing the upfront NRE investment with the expected production cost and the technical value of the solution.
When the production volume, unit economics, and technical requirements align, a custom ASIC can deliver a compelling combination of cost efficiency and product performance. For products manufactured in sufficient volumes, this can make a custom ASIC not just a technical solution, but a strong long-term business proposition.