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Routing

Sketch Routing

Starting with the Sketch Router, a designer can draw a

sketch path to dictate the location for the routing of the

selected netlines. The Sketch Router will route individual,

dozens, or even hundreds of netlines many times faster

than manual routing. Sketch routing focuses on quality;

little cleanup is needed, often none at all. The high

routing completion rate (typically >90%) is due to its ability

to automatically optimize the escapes from components

like BGAs so they are optimal for routing without any

additional vias. The Hug Router can be applied for routing

that does not complete 100%. Hug Router creates local

bias areas based on the existing routing and extracts the

designers routing intent from the previous routing.

When interactively routing individual nets, Real Trace Plow

minimizes the effort for single-ended and differential pair

nets by having the traces flow behind the cursor — no

additional clicks are needed, not even to finish!

Real Trace Plow routing automation guides

the routing with dynamic visual feedback

while pushing and shoving vias and traces

out of the way, and even clearing plane areas

as you route. When there is a large set of

routes that need to be moved, even across

rule areas, the Dynamove capability enables

smooth and fast movement of traces while it

automatically removes extra segments and

maintains high quality. Additionally, in non-

symmetric pad arrays where 45 degree

routing is prevented, you can easily route

between pads at odd angles and around

pads with curves to escape the most

challenging BGA patterns.

Auto assisted routing provides the speed and

efficiency of auto routing, with complete user

control and high quality.

Differential Pair Routing

Routing and editing differential pairs is accomplished with

speed and ease that will change your view of high-speed

design. Impedances can be easily controlled by layer- and

pair-spacing rules. If one trace is edited, the other trace in

the pair automatically moves with it. Routing differential

pairs through staggered pins or dense areas is easily

accomplished using curved and any angle traces. Pad

entry and via control are automated to provide for

symmetric pad entry with short convergence. Broadside or

adjacent layer differential pair routing capabilities add

another valuable option for routing critical signals on a

dense PCB.

Net Tuning

Multiple methods of tuning traces in your design are

provided to decrease routing schedules. Automatic

tuning provides the user with the power to open up

dense areas of a board to add length to traces where

needed. Nets can also be tuned within an autoroute pass,

or automatically based on selection to meet length and

electrical rules that may also include package lengths and

via delay/ lengths. Additionally, automatic phase or saw-

tooth tuning of differential pairs is accomplished using

your timing constraints. Once constraints are met,

automatic tuning will keep nets tuned even during push

and shove operations. While routing interactively, graphic

tuning aids are displayed for guidance, and routes are

automatically tuned as connections are completed.

Advanced auto-assisted tuning allows the designer more

interactive control to precisely add length to meet the

most complex constraint definitions. The Dynamic

Hazards function updates as you edit nets, providing

instant feedback relative to your constraints.

Advanced Interconnect Routing (HDI)

Today’s high density designs that include the highest

pincount packages with very fine pitch pins/balls like

BGA, CSP, COB, and DCA, require complex via structure

rules and the routing of microvia geometries, including

comprehensive via-in-pad rules. These designs move

beyond the method of traditional laminate layer pairing.

PCB layout facilitates the design of build-up structures on

laminate, and provides full user control of both stacked

and staggered microvia structures and how they are

defined, placed and edited.

PCB layout is facilitated with powerful differential pair routing and net tuning

capabilities for advanced high-speed designs.

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