What are common track pitch/width/spacing etc on very high density boards?

[TheUnnamedNewbie]

Due to the frequency range and research nature of my work, the stuff I do is on specialized technologies for prototyping. I use tiny pitches, laser vias, ENIPIG finishes, and expensive fancy substrates.

When I make non-high-frequency PCBs they are usually on your standard cheap-process, often with something like 150um minimum track-width and spacing.

But I was wondering what you get in high-volume industry. Seeing how the industry is commonly using 01005 and pushing towards 0201m components in things like laptops, tablets and mobile phones, which have pads on the order of 100um: What kind of pitches and clearance and track width are standard there? What is the cost of such a PCB in ultra-high-volume?

[nctnico]

Nowadays 0.9mm width/spacing shouldn't be a problem c.q. very costly.

[KaneTW]

Jlcpcb has 90um track widths.

[TheUnnamedNewbie]

Jlcpcb has 90um track widths.

Is 90um what you can expect in HDI boards for smartphones and laptops? Still seemed rather big to me. I'm used to running 80um or lower and we still struggle with routing.

[KaneTW]

Not HDI at all, just their default for multi-layer prototypes. Low-cost, Chinese HDI should go down to 60um-ish.

[nctnico]

Jlcpcb has 90um track widths.

Is 90um what you can expect in HDI boards for smartphones and laptops? Still seemed rather big to me. I'm used to running 80um or lower and we still struggle with routing.

It seems that there is a limit to what PCB manufacturers want to produce on a generic production line. Nearly a decade ago I tried to have a board made with 60um/40um but that was a no-go for a couple of 100 boards. Back then 100um was the lower limit for sane pricing. Personally I don't like to push the boundaries. I usually design with wider traces / wider clearances than what the PCB process allows for and only go for the minimum widths / clearances if it is absolutely necessary. It helps to improve yield.

[Daixiwen]

I like ACB's design rules table to get an idea of how complex a PCB will be to manufacture.
Note that ACB has rather high prices, which get crazy high if you go over their classification level 8

https://www.acb.be/wp-content/uploads/2018/04/DRC_table.pdf