Preparation of large ultrathin free-standing polymer films

Patent metadata

Field	Value
Publication number	US-10968325-B2
Application number	US-201816163220-A
Country	US
Kind code	B2
Filing date	Oct 17, 2018
Priority date	Apr 21, 2015
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A method of making large ultrathin free-standing polymer films without use of a sacrificial layer includes the steps of providing a substrate, applying a polyelectrolyte material to said substrate, applying a polymer material onto said substrate and onto said polyelectrolyte material, and directly delaminating said polymer material from said substrate and said polyelectrolyte to produce the ultrathin free-standing polymer film.

First claim

The invention claimed is:

1. An ultrathin polymer film product adapted to be positioned in a water bath, comprising:
a polymer film,
a silicon wafer,
an oxidizing acid cleaned wafer surface on said silicon wafer,
an electrostatically mediated adsorbed polyelectrolyte monolayer on said oxidizing acid cleaned wafer surface,
wherein said polymer film has a thicknesses below 100 nm,
a polymer film surface on said polymer film wherein said polymer film is initially positioned on said silicon wafer and said polymer film surface is initially on said oxidizing acid cleaned wafer surface and said electrostatically mediated adsorbed polyelectrolyte monolayer,
a marker on said polymer film,
wherein said electrostatically mediated adsorbed polyelectrolyte on said wafer surface of said silicon wafer enables said polymer film surface to separate from said wafer surface in said water bath leaving said polymer film in said water bath, and
wherein said marker on said polymer film enables said polymer film to be located in said water bath.

Assignees

• L Livermore Nat Security Llc
• General Atomics

Inventors

• Stadermann Michael
• Baxamusa Salmaan H
• Floyd Iii William C
• Miller Philip E
• Suratwala Tayyab I
• Tambazidis Anatolios A
• Youngblood Kelly Patricia
• Aracne-Ruddle Chantel
• Nelson Art J
• Chea Maverick
• Li Shuali

Classifications

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• C08J2325/06

  Polystyrene · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title

• C08J2333/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• B32B2038/0056

  Moistening · CPC title