Dry Film curing tips ?

[rompelstilchen]

Solder mask - photoresist dry film curing tips ?

hello,

(could not find the right section for this)

I have achieved my frist dry film solder mask yipeee

but I was wondering, should I make it cure in a oven ?

I ordered it on aliexpress so there aint much info about this product

it's a transparent blue roll

thanks

 

[SLK001]

What do you have to loose? I used to do the spray on resist and I would cure it prior to exposure in an oven. IMO, it really helped keep the traces sharp.

 

[FvM]

Are you sure it's dedicated solder resist film? The blue dry film photoresists I see at aliexpress are standard etch resist dry films, not intended to be baked or cured. I remember that we used these films as solder resist in our institute PCB lab in lack of real solder resist films, but they aren't actually heat resistant.

Industry standard solder resist films are usually baked plus UV cured, see

 

[rompelstilchen]

a s@#t ??? no way ?
man I thought this was thermal resistant
actually it's not clear

**broken link removed**

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I think this one should do the trick, but there should be larger sizes

https://www.aliexpress.com/item/40m...der-Plating/32413173594.html?isOrigTitle=true

 

[FvM]

The first product is an etch dry film photoresist, probably not suited as solder mask. The second is a temperature resistant sticky tape, not photo sensitive as far as I see.

 

[rompelstilchen]

any idea where I could find some
the only solder mask I found is paste

 

[FvM]

I see "dry film solder mask" offers e.g. at ebay.

 

[rompelstilchen]

yep found them too thanks