Production sealing of flat panel containers

elecrroluminescem

display technologies

have been

used in the past to form thin flat panel displays. These thin flat panel displays including

a matrix

columns

of electrodes

to the backplate between

use a backplate

structure

of

rows

and a faceplate

and

is attached

using a glass seal. There is a gap

the top of the glass frit and the bottom

of the faceplate, thousandths assembly

typically

of

an

about

inch

one

(25-50

to two

pm).

The

is then placed in an oven and heated to

the bias temperature minimise

stress

sudden

of the glass frit bars

fracturing

increase

resulting

in temperature).

(to

from

the

A laser is rhen

used to melt the glass frir. The hear of the laser melts the glass frit locally and causes it co expand such that ic contacts ‘bead’.

The

around

the backplate

laser is moved,

the surface

and forms a

drawing

of the glass

the bead

frit until

rhe

desired seal is formed. These

flat

advantages

channel.

The bulbous

bead about

portion

the periphery

sealing engagement

presents

a sealing

of the valve cover for

with a mating surface such as a

be used with other non-endless

shapes

gaskets.

simple O-ring

gasket,

shapes,

including

processes

often result in a defective

the faceplate

as a

may also be installed.

result

(Figure 4) comprises

a srructural

defining

frame

a parallelepiped

part holder is mounted over

a gasket

with

a base on

frame

structure

members

is mounted.

A

to the frame and suspended

carrier

and

a driver

or gasket

applicator. The gasket

applicator

carrier and provides into

the groove

along

the

interfaces which

attaches

a means

by rocking

channel.

The

to the gasket

to insert the gasket the gasket gasket

applicator

with the carrier via a base plate (88) to

the gasket

carrier

is slidably

wirh a curvature

coincident

of rhe gasket carrier,

mounted.

for the

slider which grasps the rail. an insertion

very shorr producrivity

period

can be accomplished of time,

while ensuring

the gasket. In addition,

thereby proper

this invention

causing

across

insertion

intrude

displays

the backplare.

result of movement assembly Overall,

Corporation,

fabrication

steps.

What

is needed

relates to the field of flat panel

method

of

displays. It describes seal material bars and methods

an effective

for forming seal material bars, using a seal material

backplate.

More

frame. It also describes a method

fiat panel

display

material

frame and a method

for forming

can result

defects

in a

and

occur

can be expensive

because

of

the

is a flat panel

for making

could also

for forming a seal

the

of the

as a

of glass frir bars when

these methods

time-consuming,

The invention

moves

from

the

is being placed into the oven.

Assignee: Candescent Technologies USA

friction

movement

In addition,

Patent number: US 6113450

California,

the laser

bead

on the active areas of the faceplate

Date: 5 September 2000 et al.

is, as the

seal and can cause the glass frir seal to

Title: Seal material frit frame for flat panel

KS. Narayanan

defects result from

of the bead causes movement

glass fric bars. The

in a

increasing

Thar

frit air is

glass frit bars. This

the area to be sealed,

movement

placed,

of glass fit bars during

process.

seals

of glass

that can later rupture,

a defect. In addition,

rhe movement heating

seal between

these are nor properly adjoining

but

fabrication

Defective

placement

an air bubble

defective

Inventor:

with rhe curvature

and acts as a guide

Production sealing of flat panel containers

carrier

The rear face of rhe base plate has a rail (124)

Thus

imprecise

between

air forms

existing

and the backplate.

from

trapped

However,

all of the

displays,

such

bars. When

The apparatus

have CRT

thinner.

cylinder head.

which

displays

are much of gaskets,

Other

panel

of convenrional

display

a fiat panel display

seal between

rhe faceplate

particularly, is needed

and

numerous

and a that has and the

a way to make that

will

a

reduce

a flat

panel display. The bars of seal material are made by extruding compound.

a mixture The

of glass frit and

seal material

between the backplate

bars

organic

are placed

and rhe faceplate and a glass

frit slurry is placed between adjoining

seal material

bars. A heating step melts the seal material so as co form a sealed interior region. Cathode

ray tube (CRT) displays are large and

bulky due to the large vacuum the cathode

0

and extend

tubes that enclose

from the cathode

to the

Sealing Technology No. 84

Checking packets for leaks Title: Apparatus and process for inspecting sealed packages Patent number: US 6105419 Date: 22 August 2000 Inventors: J. Michels and I? Bierschenk Assignee: Recot Inc, California,

Sealinq

Technology

No 54

USA