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Cover tape rework method

IP.com Disclosure Number: IPCOM000202152D
Publication Date: 2010-Dec-06
Document File: 4 page(s) / 126K

Publishing Venue

The IP.com Prior Art Database

Abstract

A rework method for cover tapes includes applying a sharp tool to push the defect unit through the pocket hole.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Page 01 of 4

3

Cover tape rework method

Technical Bulletin - (Jun, 2010)

1.0 Scope

1.1 Background

3M embossed carrier tape and cover tape is designed and manufactured follows the industry standard EIA specification. Cover tape is sealed on the top of embossed carrier tape to ensure electronic component be able to be transported without failure/missing in the semiconductor and electronic industry. Cover tape is categorized with HAA (Heat Activated Adhesive), PSA (Pressure Sensitive Adhesive), and newest 3M product UCT (Universal Cover Tape). All types are required to provide enough adhesion to ensure electronic components in cover tape without failure of de-lamination(unseal) which potentially causes components drop and end users' yield loss eventually during pick and place mechanism. Carry tape has the pocket structure which ensures the components locating inside the package protection.

1.2 Problems of current technology

Currently, if the finish products (components sealed by cover and carrier tapes) are inspected and defined "Defect", for example, up-side-down or tilt in the pocket, or component with damaged lead, the procedure of rework is a must.

To open the sealed cover tape from carrier tape, the most common method is using sharp tweezers or pin (Fig.1), penetrate cover tape from carrier tape, then take out the defect component and replace by a new one. For HAA cover tape, it should be re-sealed by heat. For PSA and UCT cover tape, heat is not necessary after rework procedure, due to the room temperature pressure sensitive adhesive.

The shortages of the traditional method are, Time consuming. Pins or tweezers method cost time during a total procedure, and relatively low rework success rate.

This should be careful and skillful, not
to break the thin cover tape, which might lead to cover tape break during end users cover tape peeling-off procedure.

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. 1 Standard rework method use tweezers


Page 02 of 4

2.0 Solution

For each carrier tape pocket, there is a pocket hole on the bottom side. Apply a sharp tool to push th...