Vis-U-Etch 5 (1)

ORP Controler/Hydrogen Peroxide (1)

ORP Controller/Sodium Chlorate based oxidizer (2)

Vis-U-Etch 5 (3)

ORP Controler/Hydrogen Peroxide (3)

ORP Controller/Sodium Chlorate based oxidizer (1)

Vis-U-Etch 5 (2)

ORP Controler/Hydrogen Peroxide (2)

ORP Controller/Sodium Chlorate based oxidizer (3)

Scroll down for comparison table

Controller

Vis-U-Etch 5

ORP Controller/Sodium Chlorate based oxidizer

ORP Controler/Hydrogen Peroxide

Control Method

Light Transmission

ORP / Normality

ORP / Normality

Etcher

Chemcut

Chemcut

Other

Etcher Model

547

547XL

Rotory

Etcher Year

88

97

94-95

Etch Chambers

2 x 4'

2 x 5'

2 x 5'

Pressure Settings (psi)

Top 1st-23, 2nd-11

Bottom 1st-20, 2nd-15

Top 40

Bottom 40

Top 30

Bottom 10

Oxidizer

GW-LCR

Cu-Ox 310

H2O2

Conveyor Speed (1oz / inches per minute)

56

40

61

Conveyor Speed (1/2 oz / inches per minute)

90

60

61 ( first chamber turned off )

Copper Content in Etchant (oz / gal)

28

26

17

Acid Normality

0.04

1.04

2.64-3.2

Specific Gravity

1.40

Not Available

1.26

ORP Setting (mV)

Not Used

508

515

SEM Results

1 oz board-4 mil trace / space

1/2 oz board-4 mil trace / space

1/2 oz board-4 mil trace / space

Comments

Displays a 4 mil trace with very consistent etch characteristic through-out panels tested. Undercut produced a 4/10 to 6/10 loss.

Sections tested through-out the test panels showed consistency. Sections display a 4.0-4.1 mil trace with almost 1 mil undercut. Customer watches acid normality very, very closely. They have experienced chlorine gas-outs on multiple occasions.

Displays a 3.9 mil foot rather than 4 mil due to the aggressive nature of the etch, circuits through-out the panels displayed no etch consistency. Undercutting produced a loss of almost 1 mil between foot and top of trace.