PASTE FOR CHARGE AND PASTE CHARGE METHOD

PASTE FOR CHARGE AND PASTE CHARGE METHOD

PROBLEM TO BE SOLVED: To provide a paste for charge for filling up efficiency good which is stabilized and can be filled up with paste even if it is the case that a small diameter hole formed in a printed circuit board, such as a through-hole and a blind via hole, etc. are fine or that an aspect rat...

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Hauptverfasser: NOGAMI TAKAMASA, KOKUNI TAKASHI
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CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PRINTED CIRCUITS
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creator NOGAMI TAKAMASA
KOKUNI TAKASHI
description PROBLEM TO BE SOLVED: To provide a paste for charge for filling up efficiency good which is stabilized and can be filled up with paste even if it is the case that a small diameter hole formed in a printed circuit board, such as a through-hole and a blind via hole, etc. are fine or that an aspect ratio is large, and to provide a paste charge method. SOLUTION: In the paste for the charge for filling up the small diameter hole, such as the through hole, the blind via hole, etc. formed in a printed circuit board, a viscosity-shear rate characteristic falls within the following formula. The inequality logY>-0.67logX+2.53 and logY
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SOLUTION: In the paste for the charge for filling up the small diameter hole, such as the through hole, the blind via hole, etc. formed in a printed circuit board, a viscosity-shear rate characteristic falls within the following formula. The inequality logY&gt;-0.67logX+2.53 and logY&lt;-0.62logX+3.18. Here, in the formula, Y expresses the viscosity of the paste for the charge [Pa s], X expresses the shear rate [1/s] of the paste for the charge. Moreover, a printer P having a squeegee 4 is used, the attack angle θ1of the squeegee 4 in an initial printing performance is set to 3-18°, a sweep speed is set to 1-30 mm/s, and the charge of the paste 1 for the charge is performed. 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SOLUTION: In the paste for the charge for filling up the small diameter hole, such as the through hole, the blind via hole, etc. formed in a printed circuit board, a viscosity-shear rate characteristic falls within the following formula. The inequality logY&gt;-0.67logX+2.53 and logY&lt;-0.62logX+3.18. Here, in the formula, Y expresses the viscosity of the paste for the charge [Pa s], X expresses the shear rate [1/s] of the paste for the charge. Moreover, a printer P having a squeegee 4 is used, the attack angle θ1of the squeegee 4 in an initial printing performance is set to 3-18°, a sweep speed is set to 1-30 mm/s, and the charge of the paste 1 for the charge is performed. 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SOLUTION: In the paste for the charge for filling up the small diameter hole, such as the through hole, the blind via hole, etc. formed in a printed circuit board, a viscosity-shear rate characteristic falls within the following formula. The inequality logY&gt;-0.67logX+2.53 and logY&lt;-0.62logX+3.18. Here, in the formula, Y expresses the viscosity of the paste for the charge [Pa s], X expresses the shear rate [1/s] of the paste for the charge. Moreover, a printer P having a squeegee 4 is used, the attack angle θ1of the squeegee 4 in an initial printing performance is set to 3-18°, a sweep speed is set to 1-30 mm/s, and the charge of the paste 1 for the charge is performed. COPYRIGHT: (C)2006,JPO&amp;NCIPI</abstract><oa>free_for_read</oa></addata></record>
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subjects CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PRINTED CIRCUITS
title PASTE FOR CHARGE AND PASTE CHARGE METHOD
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