cadence SPB17. 4 - Active Class and Subclass

Preface

allegro When placing elements on a board , Need to be in option Specify the current class and subclasses in the page .

Want to understand the meaning of these classes and subclasses .
The official local document is file:///D:/cadence/spb_17.4/doc/algrostart/appd.html

note

The number of classes is 26

There are many subclasses under each category .
The subclass names of different classes may be the same , But the meaning is different .

class - ANALYSIS

The subclasses below this class are obsolete (This subclass is no longer in use)
Subclass Analysis - _Epb_Scratch_Acon_Space_Poly The official didn't say

class - Anti Etch

No official documentation was found
Check information , It can be seen that this layer is matched keep in Area , Carry out network plane segmentation . You can assign a plane to a specified network (e.g. GND1, GND2), Make different signals have different large-area potential reference planes .

class - BOARD GEOMETRY

Plate and frame layer

Subclass 23 individual
BOARD GEOMETRY - Assembly_Detail ： Assembly layer details , Instructions for assembly requirements can be placed
BOARD GEOMETRY - Assembly_Notes ： Remarks of assembly layer , Put the text description of the assembly requirements , and Assembly_Detail Almost work .
BOARD GEOMETRY - Both_Rooms ： Place one... On all layers of the assembly layer room, Used to specify which devices can be placed in these room in , coordination “Package to Room” Use
BOARD GEOMETRY - Bottom_Room : and Both_Rooms similar , The difference is in the assembly layer bottom Layering room.
BOARD GEOMETRY - Cutout : The official didn't say , Look up the data , It is used for opening windows in the plate and frame layer .
BOARD GEOMETRY - Design_Outline, The official didn't say , It should be that the official documents didn't keep up with S026 Patch . This floor is used for placing the outer frame of the board . Press F2 when , Zoom directly to Design_Outline Draw the size of the shape of the closed board and frame view.
BOARD GEOMETRY - Dimension : Definition of dimension of placing frame layer .
BOARD GEOMETRY - Ncroute_Path： The official didn't say . Is it not officially stated , It means it doesn't matter ？
BOARD GEOMETRY - Off_Grid_Area： Definition grid Area , Whether it is a different area of the board , Grid point ( Show , Capture ) It can be different ？
BOARD GEOMETRY - Outline： Officials say this is the frame layer , But the information says that this floor is not recommended , You should use Design_Outline.
BOARD GEOMETRY - Place_Grid_Bottom： Place the bottom grid
BOARD GEOMETRY - Place_Grid_Top： Place top grid
BOARD GEOMETRY - Plating_Bar： Metallized strips ,e.g. Golden finger
BOARD GEOMETRY - Ravel : No official statement
BOARD GEOMETRY - Silkscreen_Bottom ： Bottom screen
BOARD GEOMETRY - Silkscreen_Top ： Top screen
BOARD GEOMETRY - Soldermask_Bottom ： Bottom layer resistance welding
BOARD GEOMETRY - Soldermask_Top ： Top layer resistance welding
BOARD GEOMETRY - Switch_Area_Bottom ： Has been abandoned
BOARD GEOMETRY - Switch_Area_Top ： Has been abandoned
BOARD GEOMETRY - Tooling_Corners ： It seems to be related to flexible circuit board .
BOARD GEOMETRY - Top_Room ： top floor room
BOARD GEOMETRY - Wb_Guide_Line : Definition APD+ Pad boundary in

class - Boundary

No official instructions were found

class - Cavity

No official instructions were found

class - Component Value

This class is only used for pure manual cloth board ( Scenarios that do not use schematic diagrams ), No one does that ？

Subclass 6 individual
Component Value - Assembly_Bottom ： Assemble the bottom layer , Auxiliary manual in PCB Editor Enter component values in , If it is a net list introduced from the schematic diagram , It's no use here
Component Value - Assembly_Top ： Assemble the top layer , Other same as above .
Component Value - Display_Bottom ： Show the underlying , Other same as above .
Component Value - Display_Top ： Show top level , Other same as above .
Component Value - Silkscreen_Bottom : Silk screen bottom layer , Other same as above .
Component Value - Silkscreen_Top : Silk screen top layer , Other same as above .

class - Constraint Region

No official instructions were found
It means restricted area .

Last 3 Item means ： Outer layer , Inner signal layer , Internal potential layer .

class - Device Type

This class It's in different sub-class Displays the device type in the .

class - Drawing Format

This class is used to draw drawing information . e.g. Icons for description , Title bar, etc. .

Subclass - Drawing Format:Outline Place design forms or documents
Subclass - Drawing Format:Revision_Block Differences between placement versions
Subclass - Drawing Format:Revision_Data Place version history information
Subclass - Drawing Format:Title_Block The title bar , Benchmarking schematic title block
Subclass - Drawing Format:Title_Data PCB Data in the title bar , e.g. Project name , Board name , author , date , Version number .

class - Drc Error Class

This layer is used to select DRC FALSE .
Subclasses know their meaning from their names

class - Etch

This class is for discharge wiring .

class - Manufacturing

Automatic operation ( from TCL Script operation ) The layer , Manual editing of this layer is not recommended .

class - Package_Geometry

PCB Encapsulation layer

class - Package_Keepin

PCB Encapsulate the area where you can place

class - Package_Keepout

PCB Encapsulate areas that cannot be placed

class - Pin

No official instructions were found

class - Plan

No official description found

class - Ref Des

This layer is the display of component tag number .

class - Rigid Flex

No official description found

class - Route Keepin

No official description found
It literally means allow wiring area

class - Route Keepout

No official description found
It literally means no wiring area

class - Surface Finishes

No official description found

class - Tolerance

Tolerance layer

class - User Part Number

Part number layer （e.g. Jialichuang commodity No , Internal private component number ）

class - Via Class

No official statement
Via class

class - Via Keepout

No official statement .
It is forbidden to place vias . Do you mean , Which area can't place vias ？

END

take option On page Active Class and Subclass, Combined with official documents , I have a look at it .
I have a general idea of these various Class, SubClass Use of .
Large factory documents and software are not exactly corresponding , A lot of things are not written , Turning back and forth official documents may not necessarily find the corresponding operation or instructions .
But compared with small factory software , OK, too much .