Overview of AD9988-FMCB-EBZ
The AD9988-FMCB-EBZ build is a fine pitch mezzanine assembly, supplied ready to mate with its carrier board. Assemblies of this kind pair a fine pitch component field with a high pin count connector on a compact outline, and the value of the work lies in holding placement accuracy, solder volume and impedance at the same time. A partly populated board does not meet that bar, which is why the build runs to a tested assembly.
What fine pitch mezzanine boards demand from a build
1. Connector pin count: high density mezzanine connectors can run to several hundred pins, and the breakout around them needs enough routing layers to escape without long parallel runs.
2. Impedance targets: single ended lines are held near 50 ohm and differential pairs near 100 ohm, with pair to pair skew kept small enough that timing stays inside budget.
3. Fine pitch placement: BGA and other fine pitch packages call for a flat surface finish, controlled stencil apertures and via in pad construction, because paste volume and pad flatness decide joint quality at this scale.
4. Mixed signal layout: where a board carries both sensitive analog front ends and fast digital logic, the return paths need to be kept apart, and decoupling has to sit close to the power pins rather than at a comfortable distance.
5. Mechanical clearances: the component height under the mating module and the clearance along the card edge both limit where parts can be placed.
How our process covers it
Rigid boards run from 1 to 70 layers, so the escape routing and reference planes a dense connector needs are available, with HDI at 1+N+1, 2+N+2 and 3+N+3 and laser drilling to 0.10 mm. Minimum outer line and space is 3 mil on 18 um base copper. Impedance targets are met through stack up design: +/-5 ohm under 50 ohm, and +/-10 percent from 50 ohm upward. ENIG, immersion silver and hard gold finishes are all available for fine pitch placement, and boards that combine rigid and flexible areas can be built at 2 to 10 layers. Every board passes in-process inspection at each stage plus final electrical test on flying probe or universal grid equipment. If the design is still open, electronic design support can review it before release, and PCB assembly service covers the standard build path. Final box build is available when the board ships inside a finished unit. Figures above are typical values from our capability sheet.
Core Production Process of AD9988-FMCB-EBZ
The build runs the eight-stage assembly path our lines use, from bare board inspection through to final test and packing. Our PCBA assembly process walks through each stage in turn.
On a fine pitch mezzanine board the critical gates are placement and inspection. Paste volume across a dense BGA field and X-ray confirmation of the hidden joints decide whether the assembly is usable, and neither can be recovered later in the flow.
