high density smd assembly

[exapod]

Hi,
i have some experience with smd solder with an iron (TQFP, SOIC, 0805) but know i have to solder a pcb with high density smd component, like: qfn, son and 0603 passive and i can have for free the pcb stencil.
So i was thinking of using solder paste, in your opinion is better to invest in a homemade reflow oven or a hot air gun?Can you point me some good product?My max budget is 150 euros.
Thank you very much for the help.

[Rerouter]

for high density i would probably say oven, but as for what model or modifications to play with i myself have not had to face that,

doing msop's by hot air without a nozzle can be a sod of a job,

[Falcon69]

I ran into the same problem where the components were either too small for the iron, or I just could not get to the pads with an iron.

So, using this information, I built my own reflow oven, and it works great!

http://spectrum.ieee.org/geek-life/hands-on/the-poor-mans-solder-reflow-oven/2

I bought a $35 Black&Decker 4 element 1500 watt toaster oven from Walmart, and had a go at it.  The PID controller cost me about $80.00 from Auburn Instruments ( http://www.auberins.com/ ).  I then bought a heatsink and Relay from eBay for about $24, and then I purchased a Data Logger from Vernier ( http://www.vernier.com/ ).  I've been really happy with the oven, and it works great!  Don't buy a cheap Thermocouple though, you'll get the wrong readings.  I suggest buying the ones listed off Auburn's site.

You'll need a jigsaw with a metal blade to cut the opening for the PID.  It's pretty easy to do.

[JuKu]

Another vote for an oven. My experiences are here: http://dangerousprototypes.com/forum/viewtopic.php?f=2&t=4471.

[Corporate666]

Oven is the way to go for sure.

But honestly, you don't need a temp controller/thermocouple, etc.  It's overkill.  I've reflowed tens of thousands of boards in regular toaster ovens and never had any problems.  Use the money you save on the controller on an air dispenser for solder paste.  You can get them used/cheap in the $80 range.  That will let you use off-the-shelf tubes of solder paste and easily assemble any test boards or low volumes.  That's what I do and works great.

[exapod]

Thank you. i will invest in the oven.