Allegro's pros and cons

I remember just graduated from the work of a Taiwanese businessman, with Allegro, from the pirate on the down ~ ~. Actually also used PCAD,PROTEL,POWERPCB (hereinafter referred to as 3p, plus pads on 4p, hehe ~ ~). As for mentor and cr5000 is really not free to use (a bit difficult). Aside from the software of mentor and Zuken, Allegro has advantages over other software. The greater the difficulty of your company's layout work, the more obvious is the Allegro's advantage.

Say a lot of nonsense, say its merits (preferring ~ ~):

1.Pull line is the most convenient。 Like 3p pull line, are not good control (not I do not use cooked), each pull a straight point of the mouse (exhausted). Allegro can pull the corner and push or close the pattern to pull it far (countless corners)! Of course there is the differential line setting (love of communication).

2.rerouting is the most most convenient thing I have ever encountered in any software.！！ In Allegro's version 15.0, you can also move the entire set of lines (as you would expect)! With intelligent automatic repair, line through the pad automatically center, such as powerful and convenient rerouting function! Frankly speaking, layout of the most basic work is not the pull line and move it? Doing these jobs with Allegro is simply a treat!

3. Compatibility with OrCAD is no match. Today's hardware engineers like to use OrCAD (good copy ~ ~ ~), most of the company's schematics are made with OrCAD. OrCAD and Allegro are all cadence-owned products, so as long as the schematic is correct, the PCB is absolutely correct (logically).

4. Open Software extensions. As long as you are familiar with Allegro's development language skill (Class C language), as long as you can get the features you want, Allegro does not!? Write one yourself. (Warning: Do not write automatic wiring program, or we are unemployed you also difficult, hey!) ）

5. Powerful simulation function. As long as you can use, can greatly save the product development time, and the accuracy is quite high.

6. Of course, there are other thoughtful layout of the function of the engineer, do not elaborate.

OK, the horse is finished, it's time for a batch.

1.the creation and maintenance of part library is very complicated and difficult.。 So this part needs a very experienced layout engineer.

2. Although ORCAD is tightly integrated with Allegro, most hardware engineers are now not doing what they are supposed to do, in fact they have just drawn a "" and the parts library in the OrCAD is not perfect, so the transition from OrCAD to Allegro requires experienced layout engineers as well.

3. Difficulty in Getting started. Allegro has a much longer start-up cycle than a protel to see a couple of heavenly book jobs. Even if the information is complete, someone teaches, it is estimated not less than two weeks.

4. Ulterior motives. Allegro can import many other different PCB drawing formats, but cannot export (unscrupulous traders!) ）。

5. High price. Ordinary small and medium enterprises cannot afford it.

6. There is no Chinese version (see the E-text, if there is a Chinese version I may not use.) ), you cannot enter Chinese.

Although the hardware is developing rapidly, more and more products with DDR,PCB layout to the DDR traces in the pads processing is quite troublesome, PCB design is far less convenient in Allegro. But because pads has its advantages, so many people choose pads.

★, Pads Advantages

. It is easy to build a library, and it is easy to modify.

. Easy to learn and easy to operate.

. Can modify the network in real-time, suitable for small changes, or simple board of the route.

Easy to interact with schematics, unlike Allegro's sometimes schematic and PCB connection

. It is easy to lay copper and easily turn off the copper.

Allegro's powerful capabilities are increasingly being embraced, with pads in complex products.

★, ALLEGRO's Advantages:

. ALLEGRO repair line is very convenient, intelligent, real-time display DRC.

. ALLEGRO has a convenient line-up and wire-wound routing.

. ALLEGRO can reduce the chance of network errors by automatically removing redundant components from redundant networks or by automatically adding new components and networks when the network table is being used, instead of increasing the network or removing the network when the route is taken.

. ALLEGRO can set the route rules, can set different layers, different areas of the line width and spacing.

. ALLEGRO has a stroke function, with skill added functionality.

. Allegro is more convenient for multi-person collaboration.

What are the hazards of the main components of the substrate (FR4) and PP plates and the Chinglei rays?

Commonly used FR-4 and P.P. Board, the main ingredient is epoxy resin and glass fiber . The harm you refer to, should only be the Chinglei after the shooting process will produce harmful substances. In the laser processing after the main material is carbon dioxide and resin decomposition , a move can be discharged by the exhaust system, and in addition to carbon dioxide, most will become a micro-particles fall down. Therefore, as long as the ventilation system is perfect, it should not cause significant harm.

Allegro's pros and cons