Lamination | | | |
Layer count | 2 - 30 | 32 + | >48 |
Minimum panel size | 12x18 | | |
Maximum panel size | 18" x 24" | 21" x 24" | 24" x 30" |
HDI layers | 2-3 | 4 | 8+ as permitted by laminate type |
Sequential laminations | 2-3 | 4 | 8+ as permitted by laminate type |
Layer-to-layer registration | +/-.002" | | |
Minimum board thickness, single/double sided | .005" | | .002" |
Maximum board thickness | .250" | | .300" |
Minimum core thickness | .001" | | .0005" |
Minimum core thickness (BC, Kapton) | .002" | .001" | .0005" |
Minimum prepreg fill | .003" | .002" | <.002" |
Drill | | | |
Minimum drill diameter, mechanical drill | .006" | .005" | .004" |
Mechanical drill aspect ratio, unfilled | 12:1 | 15:1 | 30:1 |
Mechanical drill aspect ratio, filled | 10:1 | 11:1 | > 11:1 |
Drill to metal (rigid) | .008" | .007" | .00525" |
Drill to metal (flex) | .012" | .007" | .00525" |
Drill Edge to Rigid Flex Transition | .100" | .075" | < .050" |
Antipad diameter over drill size | .020"+ | .016" | < .016" |
Minimum class 2 annular ring, mechanical drill | .005" | .004" | <.004" |
Minimum class 3 annular ring, mechanical drill | .007" | .006" | <.006" |
Minimum drill diameter, laser micro via | .004" | .003" | <.003" |
Microvia aspect ratio | 0.6:1 | 0.7:1 | >0.7:1 |
Microvia capture pad / hole | +.007" | +.005" | +.004" |
Control depth drill tolerance | Keep back .010" +/- .005" | Keep back .005" +/- .002" | Keep back .004 +/- .0015" |
Back drill, diameter over primary drill | .008" | .007" | <.007" |
Back drill anti-pad, diameter over primary drill | .016" | .014" | <.014" |
Etch Features | | | |
Min copper foil - Internal | 1/2 oz | 1/4 oz | 1/4 oz |
Max copper foil - Internal | 2 oz | 4 oz | 6 oz |
Min copper foil - External | 3/8 oz | 1/4 oz | 1/4 oz |
Max copper foil - External | 1 oz | 3 oz | >3 oz |
Inner Layer Print and Etch | | | |
Minimum designed line width/spacing, 1/4 ounce foil | .002" | | <.002" |
Minimum designed line width/spacing, 3/8 ounce foil | .003"/.003" | .0025"/.003" | <.0025"/.002" |
Minimum designed line width/spacing, 1/2 ounce foil | .004"/.004" | .003"/.003" | <.003/.003" |
Minimum designed line width/spacing, 1 ounce foil | .005"/.005" | .004"/.004" | .0035"/.004" |
Minimum designed line width/spacing, 2 ounce foil | .008"/.008" | .006"/.008" | .006"/.006" |
Minimum designed line width/spacing, 3 ounce foil | .010"/.010" | .008"/.010" | .008"/.008" |
Plated External Layers | | | |
Minimum designed line width/spacing, 1/4 ounce foil | | .0025"/.0025" | .002"/.002" |
Minimum designed line width/spacing, 3/8 ounce foil | .004"/.004" | .003"/.003" | .0025"/.003" |
Minimum designed line width/spacing, 1/2 ounce foil | .005"/.005" | .004"/.004" | .003"/.004" |
Minimum designed line width/spacing, 1 ounce foil | .006"/.006" | .005"/.005" | .004"/.005" |
Minimum designed line width/spacing, 2 ounce foil | .012"/.012" | .010"/.010" | .008"/.008" |
Minimum designed line width/spacing, greater than 3 ounce foil | | | Requires engineering review |
Copper fill to round feature spacing (donuts) | .006" | .005" | .005" |
Flex Button Plate | | | |
Flex PCB Button Plate: Pad + Drill, Button +Drill | Pad = DRL+ .016"/Button=DRL + .008" | Pad = DRL+ .014"/Button=DRL + .006" | Pad = DRL+ .012"/Button=DRL + .004" |
Soldermask | | | |
LDI solder mask minimum web width, green color | .004" | .003" | less than .003" |
LDI solder mask clearance | +/-.002" | +/-.0015" | less than +/-.0015" |
Legend | | | |
Inkjet legend printing | White | White | White |
Color options | Green | Red, Blue, Black, White | Red, Blue, Black, White |
Mechanical | | | |
Board profile dimensional tolerance | +/-.005" | +/-.002" | <+/-.002" |
Plated through hole diameter tolerance | +/-.003" | +/-.002" | <+/-.002" |
Non-plated through hole diameter tolerance | +.002"/-.001" | +/-.001" | <+/-.001" |
Board flatness, warp and twist Per IPC-TM-650 2.4.22 | <.75% | <.5% Balanced Construction | Unbalanced Constructions AABUS |
Impedance Testing | | | |
Impedance controlled - single ended +/- % | +/-10% | +/-5% | <+/- 5% |
Impedance controlled - edge couped diff. +/- % | +/-10% | +/-8% | <+/- 5% |
Impedance controlled - broad side diff. +/- % | +/-10% | +/-8% | <+/- 5% |