Example of Creating a Disk Button Package Footprint

PartQuest Portal Subscription: Essential or Professional

This example steps you through the process of using the Footprint Creator wizard to create a custom footprint for a disk button package of a PartQuest Portal part. A disk button is a button-shaped package where terminals may exit either radially from the package periphery, like a spoked wheel, or axially from the center.

Procedure

  1. Use the PartQuest Portal search to find “KR-5R5V155-R”, and then from any of the search results, click , and examine the part’s package information.

    The following shows package information for the KR-5R5V155-R part from the datasheet.

    Figure 1. KR-5R5V155-R Package Information



  2. From the Search page, start the Footprint Creator wizard.
  3. Use the Package Outline page to specify the package outline style and dimensions selections and value from the table below. When you are finished, click Continue to Terminals.

    Datasheet

    Wizard Option

    Wizard Selection/Value

    -

    Package Outline



    Dimensions (mm)

    General, Unit-of-Measure (UOM)

    mm (millimeters)

    -

    General, Mounting Preparation

    Straight Mounted

    Part number ‘V’ designator

    General, Body Direction

    Vertical

    -

    Package Shape



    W1 Ref=5.0mm

    Dimensions, Dimension1

    • - Tolerance(mm)=0.3

    • Nominal(mm)=5

    • + Tolerance(mm)=0.3

    Ø D=19.0 +/-0.2

    Dimensions, Dimension2

    • - Tolerance(mm)=0.2

    • Nominal(mm)=19

    • + Tolerance(mm)=0.2

    -

    Dimensions, Vertical Dimension, Standoff

    See Table Note 1.

    • Minimum(mm)=0.5

    • Maximum(mm)=0.9

    H Max=19.7

    Dimensions, Vertical Dimension, Part Height

    Maximum(mm)=19.7

    Table Note 1: Standoff is the difference between the maximum part height dimension, H Max=19.7, and the shortest part height, 19.0-0.2=18.8. Standoff, minimum is 19.7-19.2=0.5 and standoff, maximum is 19.7-18.8=0.9.

    The following shows the 2D package view, which results from the package outline options.



  4. Use the Terminals page to specify the package terminal type and dimensions selections and values from the table below. When you are finished, click Continue to Details.

    Datasheet

    Wizard Option

    Wizard Selection/Value

    -

    Terminal



    -

    Terminal Position



    -

    Additional Terminal Position Information

    Overlap



    -

    Additional Terminal Position Information, Rows/Columns

    NY=1

    -

    Additional Terminal Position Information, Terminal Function

    Electrical

    -

    Terminal Shape



    -

    Terminal Shape, Y Offset, Body Y Reference

    (No selection)

    P=5.0 +/-0.3

    Terminal Contact Positions, Pitch (x)

    • -Tolerance(mm)=0.3

    • Nominal(mm)=5

    • + Tolerance(mm)=0.3

    T=0.2

    Terminal Dimension (T.Dim), Dimension1

    • Minimum(mm)=0.2

    • Nominal(mm)=0.2

    • Maximum(mm)=0.2

    W=1.0 +/-0.1

    Terminal Dimension (T.Dim), Dimension2

    • -Tolerance(mm)=0.1

    • Nominal(mm)=1

    • + Tolerance(mm)=0.1

    L=4.0 +/-0.1

    Terminal Dimension (T.Dim), Terminal Insertion Height

    • -Tolerance(mm)=0.1

    • Nominal(mm)=4

    • + Tolerance(mm)=0.1

    The following shows the 2D package view, which results from the terminals options.



  5. Use the Details page to specify the package terminal numbering pattern and package body material using selections and values from the table below. When you are finished, click Continue to Validate.

    Datasheet

    Wizard Option

    Wizard Selection/Value

    Diagram

    Terminal Numbering Pattern



    Polarity indicators

    Terminal Numbering Pattern

    Custom Pattern = Negative,Positive

    -

    Polarization

    Polarized

    -

    Package-body Material

    Metal

    The following shows the 2D package view, which results from the terminal numbering and polarization options.



  6. Use the Validate page to view the footprint for various target design densities.

    The following 2D package view shows the footprint summary generated by the Footprint Creator wizard for the KR-5R5V155-R part package and a target design density setting of nominal material condition (nominal density).



    The Footprint Creator wizard displays the footprint summary as follows:

    Manufacturing Process Part is Compatible with:

    • Manual Placement

    • Wave Solder

    • Selective Mini Wave Solder

    • Manual Solder - Low Volume High Mix

    • Manual Solder - High Volume Low Mix (May require special attention)

    Solder Mask Clearance — 75.0 µm

    Stencil Thickness Allowable — 75 µm (3mil)

    Solder Paste Size — Solder Paste Aperture is set to 1:1 with the Pad.

Results

The disk button package footprint is complete.