Care must be taken with
stackup design, trace designs on the flexible substrates, and 3D bending.
*
Stackup: gives in-depth details of the IPC-2581
stackup including construction specifics and materials that define the finished board.
Basically, a MoM simulator includes two elements: the dielectric layer
stackup and the physical layout of the traces.
There is minimal handling of the part in the shop and less opportunity for tolerance
stackup.
"Our all-day program features tutorials on PCB
stackup design and materials selection, very high-speed differential signals, understanding the IPC standards, and basics of PCB design, among others.
Some of the information--e.g., layer
stackup, minimum feature size and spacing, number of PTHs--is not exceptionally pertinent to the assembler, but other items are.
This type of analysis is also valid to decide if special board technologies, buried capacitance for example, is worth the cost for your board
stackup configuration.
Temperature rises in the other layers of the thermal
stackup are created by differences in the packaging, not the semiconductor.
Integration also minimizes tolerance
stackup, enabling designers to pull the most from their servos.
"We are getting more precise parts because we have virtually eliminated tolerance
stackup," he says.
"Anyone who has worked in composites assembly knows that there's a significant amount of variability in the feeds and speeds needed to drill a sandwich, or what we call a '
stackup,' of different materials such as a composite skin with a titanium and aluminum substructure," Henderson said.
LAST MONTH, WE established the PCB
stackup is more than just a thickness diagram.