Key Considerations When Panelizing Printed Circuit Boards Presented by Welcome Todays Panelists Tim Madden Senior CAM Engineer Royal Circuit Solutions Tim is the Senior CAM engineer ID: 759370
Download Presentation The PPT/PDF document "To Panelize or Not to Panelize" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
To Panelize or Not to Panelize
Key Considerations When Panelizing Printed Circuit Boards
Presented
by
Slide2Welcome
Today’s PanelistsTim Madden, Senior CAM EngineerRoyal Circuit SolutionsTim is the Senior CAM engineer at Royal Circuits. He has been involved in the manufacturing and design of circuit boards for 25 years, working for a variety of companies.www.royalcircuits.com
Slide3Welcome
Today’s PanelistsChao Vang, Senior CAM EngineerAdvanced AssemblyChao is the lead engineer at Advanced Assembly for the past 7 years. She has an extensive knowledge of the PCB industry and provides customers with their DFA checks prior to assembly.www.aa-pcbassembly.com
Slide4PANELIZATION FOR Fabrication
Pros and Cons for Fabrication
Slide5Things To Consider
Fabricator’s Panel Size and Usable Area SpecsRoyal Circuits fabs in 18”x24” panelsRoyal Circuits usable area is 16”x22”Panelize in the design or let fab houseFiducialsRoyal Circuits .040 pad .080 mask openingChoosing Depanelization Method
Slide6Depanelizing Boards
Two MethodsMouse Bites (aka Breakaway Tab or Routing)V-Score (aka V-Groove)
Slide7What Method Do You Use?
Which method do you prefer when panelizing
boards?
V-Score
Mouse Bites
Don’t Know
Slide8Mouse Bites
How to create them:Router cuts outline of the majority of the boardFew places remain attached and drill holes will be made there to weaken area
Slide9Mouse Bites
Location of drill holes:In center of piece connecting board large laminate left overFurther into board, ideally with outside edge of holds in line with edge of board cleaner break
Slide10Mouse Bites
Consult your fab house for specific requirementsRoyal Circuits standard specs unless special request:.1 spacing between boards.5 rail3 fiducials on rails (2 bottom & 1 top)Fiducial .040 diameter pad with .080 mask opening.125 tooling in all four corners
Slide11Mouse Bite PCB Example
Slide12V-Scores
How to create them:Shallow v-shaped groove is made on top and bottom of board
Benefits:
May result in lower costs than mouse bitesV-scores are easier to make than drilling holes along tabs (consult your fab house)Requirements:Royal Circuits needs .015 clear (depending on board thickness) from board edge of any copper feature
Slide13V-Score Example
Slide14PCB with Routing & V-Scores Example
Slide15PANELIZATION FOR Assembly
Slide16Why Assemble In Panels
Assembly Time is ReducedEliminate time to change out boards on Pick ‘n Place machinesReduce reflow oven time
It’s just one giant board to us!
Slide17Things To Consider
Stencil & Solder ApplicationMust inform assembly house to create panelized stencilFiducial placementSome assembly houses use Paste Printer Stencil & panelized design files not neededAdvanced Assembly includedFitting in Assembly MachinesMust fit in Pick ‘n Place & Reflow OvensAdvanced Assembly can accommodate up to 20” x 24”
Slide18Things To Consider
Shipping Costs
Shipping small boards is relatively easy and inexpensive
Shipping larger panels can make things more expensive
Odd Shaped Boards (IE: Small Cutouts, Circular Shapes)
Some assembly houses need to have rails or tooling frames added to provide parallel edges for processing
Advanced Assembly can accept any shape
Depanelizing Boards
Slide19Depanelizing – Mouse Bites
ConcernsRough spots where they were attachedRequires additional time to sand which translates to additional costBoards that have been mostly routed out are structurally weakMay easily pop out earlier than desired
Slide20Depanelizing – V-Scores
Benefits:Create greater strength while still part of panelPreferred method of assembly houses Advanced Assembly includedConcerns:Lots of force need to break apartImportant to make sure components are not popped off during processCopper traces too close to score may result in splitting during poppingAdvanced Assembly requires 10 to 15 mils clearance (depending on board thickness)
Slide21Depanelizing – Part Placement
Components on EdgesGive components on edges (or hang over edges) sufficient space to placed without covering adjacent boardAdvanced Assembly may put job on hold to resolve connector on edge issues
Slide22Proper Edge Connector Example
Slide23Depanelization Machine
V-Score
Depanelizer
- Maestro 3E
Mouse
Bite
Depanelizer
- FKN
Systek
N200
Depaneling
Punch
Slide24Communication is Key
Consigning BoardsWill boards be sent in panels?Are there any parts or connectors close to edges that could cause depanelization issues?Do you want assembly house to depanelize boards before shipping?There will be an additional labor cost to pop boards if not turnkeyOr choose turnkey to reduce headaches
Slide25Questions?
Email tim@royalcircuits.com or chao@aapcb.com with additional questionsToday’s attendees will be sent a free white paper, “To Panelize or Not to Panelize.”Winners of the free Raspberry Pi drawing will be notified later today. Thank you!