Densly packing tall components

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In my present commission I am required to mount 80+ CAPC6050x500 capacitors into a relatively small area. In experimenting with FP Expert I noticed that the courtyard does not vary with the height of the component and my concern is that placing a lot of tall components, courtyard to courtyard, may cause problems in reflow as there may be problems with shadowing in IR ovens and dead spots if using forced air convection. 
My questions are - is my concern realistic and are there any further recommendations for this situation?  
Many thanks

Neil

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NeilVP Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 01 Jan 2013 Location: York, England Status: Offline Points: 7	Post Options Post Reply Quote NeilVP Report Post Thanks(1) Quote Reply Topic: Densly packing tall components Posted: 26 Feb 2014 at 3:57am
	In my present commission I am required to mount 80+ CAPC6050x500 capacitors into a relatively small area. In experimenting with FP Expert I noticed that the courtyard does not vary with the height of the component and my concern is that placing a lot of tall components, courtyard to courtyard, may cause problems in reflow as there may be problems with shadowing in IR ovens and dead spots if using forced air convection. My questions are - is my concern realistic and are there any further recommendations for this situation? Many thanks Neil



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 26 Feb 2014 at 7:11am
	The FP Designer is Strictly used for Mfr. Recommended Footprint patterns for Non-Standard component packages that do not fit into the IPC Calculator. The user defines the placement courtyard size based on their personal requirements (because the component manufacturer's do not recommend any courtyard dimensional data).
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Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 26 Feb 2014 at 7:16am
	I'm getting the FP Designer and the Library Expert Calculator mixed up here. The IPC Calculator is just a recommendation (not a hard coded standard). Placement Courtyard sizes for each 3-Tier Environment are - Least = 5 mil (0.12 mm) Nominal = 10 mil (0.25 mm) Most = 20 mil (0.50 mm) The User can change the courtyard excess value to anything you want in User Preferences or on the fly in the IPC Calculator.
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