Browse Prior Art Database

HIGH-DENSITY COMPONENT REEL PACKAGES

IP.com Disclosure Number: IPCOM000009699D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-11
Document File: 4 page(s) / 141K

Publishing Venue

Motorola

Related People

Tan Kok Kiang: AUTHOR [+3]

Abstract

Today, over 80% of surface mounted compo- nents are packaged in a tape and reel format. In line with product and thus component miniaturization initiatives, most circuit components used today are surface mount components in 8 by 12mm tape and reel packages. This article describes how such packages can be redesigned to provide a higher den- sity of components by using more area in a tape and reel.

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MOTOROLA Technical Developments

HIGH-DENSITY COMPONENT REEL PACKAGES

by Tan Kok Kiang, Tan Oon Pheng and Seow Kean Hong

INTRODUCTION

  Today, over 80% of surface mounted compo- nents are packaged in a tape and reel format. In line with product and thus component miniaturization initiatives, most circuit components used today are surface mount components in 8 by 12mm tape and reel packages. This article describes how such packages can be redesigned to provide a higher den- sity of components by using more area in a tape and reel.

ISSUES

  The smallest tape and reel package today is the 8mm width tape and reel used, for example, to pack "0402" and "0603" components. Current tape and reel packages, especially for "0402" components, use very little area in a tape and reel. Table 1 shows the percentage of area used in 8mm width tape and reels "0402" and "0603" components respectively.

  With this constraint, the quantity of components per reel is limited by reel diameter. Furthermore, with a fast rate of use, these components deplete quickly and therefore have to be replenished often. Also, for high usage parts, feeder indexing is trig- gered more often and this will result in more wear and tear for feeders carrying such parts. Although reels with larger diameter can be used to carry the high usage parts, such reels cause high vibration and are difficult to roll within a feeder carriage.

PROPOSED SOLUTION

  A high-density component reel package is pro- posed. This package requires changing the orienta- tion of components as compared to conventional reel packages as shown in Figure 1 and Figure 2. Consequently, more area of the reel is used and, hence, the density of components is increased.

  Calculation in terms of tape and reel area uti- lization and also the quantity of components in the high-density component reel package is shown in Table 1 for 8mm and 12mm reels. Since one time feeder indexing may present two or more compo- nents for pick-up, a pick-and-place machine has to check whether another feeder indexing has to be performed for each additional component to be picked.

BENEFITS

  The benefits of the high-density component reel package is as follows:

  1) As component quantity per reel with the same diameter is d...