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[MOVED] 6 layer stack up, 50ohm - single, 100 ohm diff, low cost prototype suggestions

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[MOVED] 6 layer stack up, 50ohm - single, 100 ohm diff, low cost prototype suggestions

Hi!
Structure of my PCB stack up:
L1--^---^--- SIG
L2----------- GND [PLANE]
L3--^---^--- SIG/PWR
L4--^---^--- SIG/PWR
L5----------- GND [PLANE]
L6--^---^--- SIG

on L1/L6 assembled BGA (DDR2,FPGA) with pitch 0.8mm, so i need route aproximately 0.1/0.1 (line/clr.) and VIA about 06/03 or 05/02
L1/L3/L4/L6 single - 50ohm, diff - 100ohm


Please suggest me standart manufacturable low/midle coast stack up structure. Of couse it is possible play with polar speed stack up, but amount of combinations i will take for structures. I need some stack from practice from real manufacture.

Thank you!
 

your best bet is to contact your board house and ask them to give you the stack-up.
 

yes, i agree with loosemoose, it is the best way to advice your engineer, even the manufacturer could not give you the best choice.

Jack
soppcbtech at gmail dot com
 

another thing: if you want to have 50R_se in your 100R diffpairs: its not possible. Z0_se >> Z0_diff/2. They are equal if the separation is infinite.
If they are separate signals, then its OK, your SE signals will be wider than the diff signals.
 

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