This author is concerned off his allegro constitute the basics of the package.
allegro is a very novice-friendly software. Many people give up because it is difficult to learn him.
But he is a very good software design. Do not do more evaluation of his merits. allegro and very high utilization rate, in order not to use because it would not be abandoned dream company. He can only bite the bullet and to learn.
In order to allow more unfriendly because of his peers will not abandon him. The author in accordance with his own understanding of the learning process to let everyone detours.
In the study allegro before must not be used to do. Should be gradual and based on clearly understand first of these will let you learn the basics allegro more effective, handy.
Package configuration:
As shown below. A standard original package contains the following information. Now an explanation (Note: Due to the different requirements of different companies, different information of the author's will, and others included in the package label nature of this information add their own according to their own habits or standard)
- :( Overview Original non-essential)
From top to bottom, respectively: a package name. The used pads. The height of the original entity. Finally units.
- Dimensions :( non-essential)
FIG purple solid block is an original block size. 5 Dimension were: length and width of the original entity. Package length and width. Pad center spacing
- :( package information at all levels of the information contained nonstandard this package. Various requirements of different companies may differ)
Below, to spread out all of the information package. We introduced one by one.
Purple block: Flag original size solid forms. Some companies will require must contain. Find time for the original patch.
Green filled rectangle: place bound
Size: size generally consistent with the package.
Role: ① marked the original height (Overview This marked difference with the original, the original information Overview software does not recognize, just look at the label to engineer here is to identify the labeling software after a highly export 3D files, structural engineers. CAD can be used to see whether the original structure and matches, there is no interference)
② In the packaging arrangement is to prevent overlapping. When the two overlapping place bound, software error. DRC error display. DRC code CC
Pad: an essential part of the package. For welding. Connect the various originals
Screen frame: frame marked packages. Respectively, it can also be used like a resistor-capacitor inductance. In general the width of 0.15-0.2mm
- Screen characters: the following figure. Four characters are marked: Original value (such as a resistor the resistance). Original Type. Original mounting layer bit number. The board surface of the original silk-bit number
If it is not required by first three can not. Finally, a surface must have a screen. And so as to correspond to the principle.
It is at the level indicated by the arrow.
To sum up a package that must have some information. Screen printing frame, a pad, place bound bit number. But in doing it is the best package to add more information. This is more standard and standardized. And better recognition.
The above mentioned information is included in a package. I hope this information will help you learn.