E.i. Dupont De Nemours and Company

Roberto Irizarry

Haixin Yang

Patricia J Ollivier

Kalyana C Pyada

The process for making silver powder particles with very small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.

Process for making silver powder particles with very small size crystallites

Embodiments of the invention relate to a silicon semiconductor device, and a conductive thick film composition for use in a solar cell device.

Devices containing silver compositions deposited by micro-deposition direct writing silver conductor lines

The process for making silver powder particles with small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.

Process for making silver powder particles with small size crystallites

Disclosed herein is a continuous process for producing silver powders comprising silver particles. Each powder is comprised of silver particles that have a specific morphology that is determined by the process conditions and the use of one or more particle modifiers in the process. A reactor for carrying out the process is also disclosed. The silver powders produced are particularly useful in electronic applications.

Reactor and continuous process for producing silver powders

There is disclosed a silver powder comprising silver particles, each said silver particle comprising silver components 100-500 nm long, 80-100 nm wide, and 80-100 nm thick, assembled on the surface of silver to form a spherically-shaped, open structured particle, wherein the surface of the particle resembles the surface of an orange rind and the dparticle size is from about 2.5 &#x3bc;m to about 6 &#x3bc;m. Also disclosed is a process for making these silver particles. The silver particles formed are particularly useful in electronic applications.

Silver particles and processes for making them

Silver powders containing particles with a different morphology are disclosed. The silver particles are spherically-shaped with an open structure surface. The majority of the spherically-shaped silver particles have one or more silver plates attached to each of the majority of the spherically-shaped silver particles. Also provided is a process for making these silver particles. The silver particles formed are particularly useful in electronic applications.

Silver particles and a process for making them

A silver powder comprising silver particles, each silver particle comprising silver components 100-2000 nm long, 20-100 nm wide and 20-100 nm thick assembled to form a spherically-shaped, open-structured particle, wherein the dparticle size is from about 2.5 &#x3bc;m to about 6 &#x3bc;m is disclosed. Also disclosed is a process for making these silver particles. The silver particles formed are particularly useful in electronic applications.

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Raleigh, NC, United States of America

Roberto Irizarry