VAT Series 65 Pendulum Valve In-Place PM Technique

Fig 31 & 32: MiraWIPES^® wiping VAT valve


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BEFORE		AFTER

Vacuum Chamber PM Technique
VAT Series 65 Pendulum Valve In-Place

OBJECTIVE:
TO EFFECTIVELY PM THE VAT SERIES 65 PENDULUM VALVE IN A TIMELY MANNER, WHILE MOUNTED IN PLACE, MINIMIZING EQUIPMENT DOWN TIME AND IMPROVING TOOL PERFORMANCE

	Vacuum Chamber:	LAM 9600 METAL ETCH, OR EQUIVALENT
	Vacuum Chamber Process Residue:	PROCESS INDUCED RESIDUE
	Vacuum Chamber Components:	VAT SERIES 65 PENDULUM VALVE


	Old Procedure:	Currently NOT ABLE to effectively clean in place

	New Procedure:	Foamtec International VAT Valve PM Kit, liter DI water and IPA


	Vacuum Chamber Products:
	VAT Valve PM Kit
	PM Kit P/N: HT4500-LAM23-2
		(2) FT831 handles w/inserts for head (2) Rounded heads for handle w/hook (2) 280D Grit ScrubPAD sets w/loop to attach to head (2) UltraSOLV^® Foam sets w/loop to attach to head (2) MiraWIPE^® sets w/loop to attach to head (2) 280D Grit ScrubTIP^® w/lollipop head to attach to handle (1) HT1712-10 12" UltraSOLV^® Swabs (1) HT1790-5 5.5” UltraSOLV^® Swab with angle (2) HT4528D-10-1 280 Grit Diamond ScrubPAD (1) HT4536D-10-1 360 Grit Diamond ScrubPAD (1) HT4580D-10-1 800 Grit Diamond ScrubPAD (1) HT4754 UltraSOLV^® Sponge (1) PT4369 FirmWIPE^® Disk (1) HT5790S-25 MiraWIPE^®

LAM 9600 Metal ETCH VAT Valve PM Procedure:

View “How to” instructional videos on http://foamtecintlwcc.com/video/

Step 1:

Using proper procedures and safety guidelines properly shutdown and vent entire Metal ETCH Chamber

Step 2:

Reduce ETCH chamber heaters to recommended settings

Step 3:

Must perform Foamtec International’s LAM Metal ETCH Chamber Cleaning Technique to ensure the Metal ETCH Chamber does not contaminate the VAT valve

Step 4:

Ensure to leave pendulum valve stepper motor attached to valve body for the initial portion of PM procedure (See Fig 1)



	Fig 1: Pendulum valve stepper motor remains in place

Step 5:

Disassemble and remove all other VAT valve assemblies

Step 6:

Actuate the pendulum valve stepper motor and retract the sealing ring pins to provide room for cleaning the back portion of the VAT valve (See Fig 2 & 3)


	Fig 2: Sealing ring pin extended		Fig 3: Sealing ring pin retracted

Step 7:

In order to protect turbo pump during the VAT valve PM, take the PT4369 FirmWIPE^® Disk and properly place over pump (See Fig 4 & 5)


	Fig 4: PT4369 FirmWIPE^® being put into place		Fig 5: PT4369 FirmWIPE^® protecting turbo pump

Step 8:

Take FT831 handle and attach one of the rounded heads with hook to the end of the handle and attach a set of UltraSOLV^® Foam Wipes to the head (See Fig 6 & 7)


	Fig 6: Rounded head with hook attached to handle		Fig 7: UltraSOLV^® Foam Wipes attached to head

Step 9:

In a small bucket of DI water moisten the foam wipes attached to the handle head and ring-out excess water (See Fig 8). Then proceed to perform a pre-wipe on the inner portions of the VAT valve (See Fig 9)


	Fig 8: Dampen UltraSOLV^® Foam Wipe in DI water		Fig 9: Pre-wipe inner portions of VAT valve

Step 10:

Take the second FT831 handle and attach another circular head and attach a set of 280 Grit Diamond ScrubPADs to the circular head (See Fig 10)



			Fig 10: ScrubPAD attached to second rounded head

Step 11:

Dampen the 280 Grit Diamond ScrubPAD with DI water and begin to scrub the inside of the VAT valve, concentrating on the heavy buildup deep in the back of the valve (See fig 11 & 12)



		Fig 11 & 12: ScrubPAD scrubbing inside of VAT valve

Step 12:

Alternate between using both handles; scrubbing the deposition with the ScrubPAD while wiping the loose deposition off with the UltraSOLV^® Foam Wipe

Step 13:

Continue to moisten the ScrubPAD and UltraSOLV^® Foam Wipes with DI water, as necessary, to help scrub and remove the deposition from the VAT valve

Step 14:

Dampen the HT4754 UltraSOLV^® Sponge in DI water and ring-out excess water from sponge (see Fig 13)



			Fig 13: Dampen UltraSOLV^® Sponge in DI water

Step 15:

Remove deposition buildup from ScrubPAD by pulling ScrubPAD across dampened UltraSOLV^® Sponge, as necessary (See Fig 14 & 15)



		Fig 14 & 15: Unloading Diamond ScrubPAD onto UltraSOLV^® Sponge

Step 16:

Having sufficiently cleaned the deep areas within the VAT valve, remove the circular head with the 280 Grit Diamond ScrubPAD and insert the 280 Grit Diamond ScrubTIP^® on the FT831 handle (See Fig 16 & 17)



		Fig 16 & 17: FT831 handle w/280 Grit Diamond ScrubTIP attached

Step 17:

Finish scrubbing the rest of the VAT valve using the 280 Grit Diamond ScrubTIP^®, reaching the tight areas throughout the valve, using the same technique described above (See Fig 18)



			Fig 18: Scrubbing the tight areas throughout VAT valve

NOTE:

REMEMBER TO USE THE HANDLE WITH THE UltraSOLV^® FOAM WIPES TO REMOVE DEPOSITION FROM THE VAT VALVE, AS NECESSARY

Step 18:

When Diamond ScrubPAD and ScrubTIP^® become worn, replace with second set of ScrubPAD and ScrubTIP^® within PM Kit

Step 19:

Dampen a HT4528D ScrubPAD with DI water and proceed to scrub all areas throughout VAT valve that can be reached by hand (See Fig 19). If design permits, reach through the transition manifold by hand to scrub some of the remaining areas in the back of the VAT valve (See Fig 20)


	Fig 19: Scrubbing areas throughout valve by hand		Fig 20: Reaching the back of VAT valve by reaching through transition manifold and scrubbing with 280 D Grit ScrubPAD

NOTE:

REMEMBER TO UNLOAD ALL SCRUBPADS AS NECESSARY WITH HT4754 UltraSOLV^® SPONGE

IMPORTANT
DO NOT SCRUB THE TURBO PUMP SEAL UNLESS PLANNING TO REMOVE AND REPLACE TURBO PUMP. JUST WIPE WITH IPA & MIRAWIPES^® DURING FINAL WIPE PORTION OF PROCEDURE (SEE FIG 21)



	Fig 21: Turbo pump seal, 'DO NOT SCRUB" unless replacing turbo pump

Step 20:

Take moistened HT4754 UltraSOLV^® Sponge and wipe out VAT valve as necessary to remove deposition during scrub process

Step 21:

Using proper procedures and safety guidelines, disassemble and remove pendulum valve stepper motor

Step 22:

With pendulum valve stepper motor removed, reach in with Diamond ScrubPAD to scrub area next to where the stepper motor was attached and wipe with UltraSOLV^® Sponge (See Fig 22)



	Fig 22: 280 Grit Diamond ScrubPAD scrubbing area next to stepper motor

Step 23:

Using same technique as described above, moisten HT4536D 360 Grit Diamond ScrubPAD and proceed to scrub the outer sealing surface of VAT valve (See Fig 23)



			Fig 23: 360 Grit Diamond ScrubPAD removing deposition on outer sealing surface

Step 24:

BE SURE NOT TO WIPE THE FACE OF THE SHOWER HEADS WITH THE HT5790S MiraWIPES^®

Step 25:

Replace small bucket of DI water with fresh DI water and proceed to rinse out HT4754 UltraSOLV^® Sponge to prep the VAT valve for Final IPA Wipe Procedure

Step 26:

Use fresh DI water moisten HT4754 UltraSOLV^® Sponge and proceed to wipe down as much of the VAT valve as can be reached. Continue to rinse out sponge as necessary

REPLACING PENDULUM VALVE STEPPER MOTOR:

Step 27:

Take HT1790 UltraSOLV^® Swabs and dampen with IPA. Proceed to wipe the stepper motor seals free of vacuum grease (See Fig 24)



	Fig 24: UltraSOLV^® Swab cleaning stepper motor seals

Step 28:

Apply IPA to MiraWIPE^® and effectively wipe out stepper motor seals (See Fig 25)



			Fig 25: MiraWIPE with IPA wiping out seals

Step 29:

Take HT1712-10, 12” UltraSOLV^® Swab and dampen with IPA and proceed to wipe guide pins as much as possible (See Fig 26)



	Fig 26: UltraSOLV^® Swabs wiping guide pins

Step 30:

Using proper procedures and guidelines to replace pendulum valve stepper motor back into VAT 65 Pendulum Valve

Step 31:

Actuate pendulum valve stepper motor to retract guide pins (See Fig 27)



			Fig 27: Pendulum valve guide pins retracted

!!!! IMPORTANT !!!!

REACH INTO VAT VALVE AND REMOVE PT4369 FirmWIPE^® DISK THAT WAS PUT INTO PLACE TO PROTECT THE TURBO PUMP (SEE FIG 28)



			Fig 28: PT4369 FirmWIPE Being pulled out of place

FINAL WIPE PROCEDURE:

IMPORTANT NOTE

THE USE OF HT5790S MiraWIPES^® DURING THE FINAL WIPE PORTION OF THE PROCEDURE IS A CRITICAL STEP TO EFFECTIVELY REMOVE PARTICLE DEFECTS

Figure below shows how much more deposition the Foamtec International MiraWIPE^® can remove from a critical surface compared to the standard fab wiper, making the MiraWIPE^® FINAL WIPE PROCEDURE the most CRITICAL STEP of the PM procedure (See Fig 29a & 29b)


Fig 29a: Current fab wiper after completely wiping chamber		Fig 29b: Particles picked up using HT5790S MiraWIPES^® after completely wiping with current fab wiper


	MiraWIPES^® are the KEY STEP for DEFECT REDUCTION and IMPROVED TOOL RECOVERY

This important step must be effectively followed in order to achieve the maximum efficiency of tool recovery and performance. Continue to wipe-down all of the affected PM areas within the VAT valve, repeating until MiraWIPES^® no longer remove deposition

Ensure to wipe down all parts, o-rings and o-ring grooves that are placed back into the VAT valve using additional IPA dampened HT5790S MiraWIPES^®

Step 32:

Remove UltraSOLV^® Foam Wipes from circular head attached to FT831 Handle and replace with MiraWIPES^®

Step 33:

Dampen MiraWIPES^® attached to FT831 handle with IPA (See Fig 30)



			Fig 30: MiraWIPES^® attached to FT831 handle soaked with IPA

Step 34:

Using FT831 handle w/MiraWIPES^®, proceed to reach into the VAT valve and wipe out as much of the VAT valve as possible. Replace the set of MiraWIPES^® attached to the handle with a clean set of MiraWIPES^® as they become excessively dirty

Step 35:

Take HT5790S MiraWIPE^®, fold into quarters and dampen with IPA. Reach into the transition manifold and wipe out as much of the VAT valve as possible. Concentrate on tight areas that the VAT valve handle may not be able to effectively reach. Also concentrate on effectively wiping the top edges of turbo pump (See Fig 31 & 32)

Step 36:

Dampen the HT1712 UltraSOLV^® Swabs with IPA and wipe all edges and tight corners throughout VAT valve. Replace UltraSOLV^® Swab as necessary and repeat process

Step 37:

Continue to wipe out VAT valve by wrapping a clean HT5790S MiraWIPE^® around circular head at the end of the FT831 handle. Then moisten w/IPA and reach into VAT valve to continue wiping all internal structures of VAT valve

Step 38:

Dampen HT5790S MiraWIPE^® and effectively wipe down all sealing surfaces within the VAT valve

NOTE:

The entire MiraWIPE^® Final Wipe Procedure steps are the most important steps in the VAT Valve PM Procedure. It is ESSENTIAL to perform these steps with the MiraWIPES^®, as the MiraWIPES^® are the key element to IMPROVE TOOL RECOVERY and REDUCE PARTICLES

FINAL STEPS:

Step 39:

Using remaining products, such as HT4528D & HT4536D ScrubPADS, effectively clean all the remaining parts to be placed back into the VAT valve (valve bonnet, pendulum valve, sealing ring…)

Step 40:

Ensure to take an HT5790S MiraWIPE^® and dampen w/IPA and wipe down all parts being placed back into VAT valve

Step 41:

Take an HT5790S MiraWIPE^® and wipe down Metal ETCH Chamber ENTIRELY prior to closing and placing under hi-vac

TOOL RECOVERY:

Step 42:

Follow proper tool recovery guidelines as outlined by LAM Research Corporation