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Browse Prior Art Database

SAWN WAFER SHIPPING BOX

IP.com Disclosure Number: IPCOM000006236D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2001-Dec-17
Document File: 1 page(s) / 69K

Publishing Venue

Motorola

Related People

Frank Arthur: AUTHOR [+2]

Abstract

Sawn wafers are typically shipped in packages comprising layers of non-shedding and non-contami- nating paper placed between the wafers with outer cardboard layers. The layered package is held together by tape. The taped package is then placed in a foil bag which is sealed. Groups of bags are held together by rubber bands according to the quantity of wafers required. Present packaging allows up to 10 wafers per foil bag.

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MOTOROLA INC. Technical Developments Volume 13 July 1991

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SAWN WAFER SHIPPING BOX

by Frank Arthur and Keith Minwell

THE PROBLEM

  Sawn wafers are typically shipped in packages comprising layers of non-shedding and non-contami- nating paper placed between the wafers with outer cardboard layers. The layered package is held together by tape. The taped package is then placed in a foil bag which is sealed. Groups of bags are held together by rubber bands according to the quantity of wafers required. Present packaging allows up to 10 wafers per foil bag.

  This type of packaging suffers from a number of disadvantages. The packaging does not form a rigid structure so that the wafers can flex during shipping. As a result the die may rub together which can cause cracks ar chips to the die. This can produce a 2% yield loss. The die may also become contaminated by foreign particles from the packaging material itself. Furthermore, this type packaging requires a significant number of layers of paper and cardboard as well as the foil bag which increases the manufacturing and ship ping costs and also complicates the packaging and shipping process since the sawn wafers must go through a number of handling processes before it is sealed and ready for shipping.

THE SOLUTION

A new and improved sawn wafer shipping pack- age is shown in Figure 1. The sawn wafer shipping

box comprises two identical halves 2, 4 made by injection moulding from non-contaminating material such as 100% pol...