Method of forming films of electro-luminescent phosphor

Claim 1

THE METHOD OF FORMING ON A LIGHT-TRANSMITTING ELECTRICALLY-CONDUCTING LAYER CARRIED ON A GLASS SUBSTRATE, A THIN, CONTINUOUS, LIGHT-TRANSMITTING FILM OF PRESELECTED ELECTROLUMINESCENT MATERAIL, WHICH METHOD COMPRISES; VACUUM EVAPORATING A THIN FILM OF SUBSTANCE AT LEAST PRINCIPALLY COMPRISING THE MATRIX COMPONENT OF SAID PRESELECTED ELECTROLUMINESCENT MATERIAL ONTO A LIGHT-TRANSMITTING, ELECTRICALLY-CONDUCTING LAYER CARRIED ON A GLASS SUBSTRATE; PLACING ABOUT AND IN CONTACT WITH THE FORMED THIN FILM, FINELY-DIVIDED MATERIAL PRINCIPALLY COMPRISING THE MATRIX COMPONENT OF SAID PRESELECTED ELECTROLUMINESCENT MATERIALS AND ALSO INCLUDING ACTIVATOR IMPURITY SUBSTANCE IN ABOUT THE PROPORTIONS IN WHICH SUCH IMPURITY SUBSTANCE IS NORMALLY ADDED AS ACTIVATOR IMPURITY TO THE RAW MIX IN PREPARING SAOD PRESELECTED ELECTROLUMINESCENT MATERIAL IN FINELY-DIVIDED FORM; FIRING FOR A PREDETERMINED TIME THE FORMED THIN FILM, SUPPORTING SUBSTRATE AND CONTACTING FINELY-DIVIDED MATERIAL AT A PREDETERMINED TEMPERATURE AT LEAST APPROACHING THE FIRING TEMPERATURE NORMALLY USED IN MAKING SAID PRESELECTED ELECTROLUMINESCENT MATERIAL IN FINELY-DIVIDED FORM AND LESS THAN THE TEMPERATURE AT WHICH SAID SUBSTRATE WILL SOFTEN, TO RENDER SAID FORMED FILM ELECTROLUMINESCENT; AND THEREAFTER SEPARATING THE FIRED ELECTROLUMINESCENT THIN FILM AND SUPPORTING SUBSTRATE FROM RESIDUAL FINELY-DIVIDED CONTACTING MATERIAL.

Claim 2

THE METHOD OF FORMING ON A LIGHT-TRANSMITTING ELECTRICALLY-CONDUCTING LAYER CARRIED ON A GLASS SUBSTRATE, A THIN, CONTINUOUS, LIGHT-TRANSMITTING FILM OF PRESELECTED ELECTROLUMINESCENT MATERAIL, WHICH METHOD COMPRISES; VACUUM EVAPORATING A THIN FILM OF SUBSTANCE AT LEAST PRINCIPALLY COMPRISING THE MATRIX COMPONENT OF SAID PRESELECTED ELECTROLUMINESCENT MATERIAL ONTO A LIGHT-TRANSMITTING, ELECTRICALLY-CONDUCTING LAYER CARRIED ON A GLASS SUBSTRATE; PLACING ABOUT AND IN CONTACT WITH THE FORMED THIN FILM, FINELY-DIVIDED MATERIAL PRINCIPALLY COMPRISING THE MATRIX COMPONENT OF SAID PRESELECTED ELECTROLUMINESCENT MATERIALS AND ALSO INCLUDING ACTIVATOR IMPURITY SUBSTANCE IN ABOUT THE PROPORTIONS IN WHICH SUCH IMPURITY SUBSTANCE IS NORMALLY ADDED AS ACTIVATOR IMPURITY TO THE RAW MIX IN PREPARING SAOD PRESELECTED ELECTROLUMINESCENT MATERIAL IN FINELY-DIVIDED FORM; FIRING FOR A PREDETERMINED TIME THE FORMED THIN FILM, SUPPORTING SUBSTRATE AND CONTACTING FINELY-DIVIDED MATERIAL AT A PREDETERMINED TEMPERATURE AT LEAST APPROACHING THE FIRING TEMPERATURE NORMALLY USED IN MAKING SAID PRESELECTED ELECTROLUMINESCENT MATERIAL IN FINELY-DIVIDED FORM AND LESS THAN THE TEMPERATURE AT WHICH SAID SUBSTRATE WILL SOFTEN, TO RENDER SAID FORMED FILM ELECTROLUMINESCENT; AND THEREAFTER SEPARATING THE FIRED ELECTROLUMINESCENT THIN FILM AND SUPPORTING SUBSTRATE FROM RESIDUAL FINELY-DIVIDED CONTACTING MATERIAL.