HMC462
v04.1210
GaAs PHEMT MMIC
LOW NOISE AMPLIFIER, 2 - 20 GHz
1
Mounting & Bonding Techniques for Millimeterwave GaAs MMICs
Tꢀꢁ dꢂꢁ ꢃꢀꢄuꢉd bꢁ attacꢀꢁd dꢂꢆꢁctꢉy tꢄ tꢀꢁ gꢆꢄuꢊd ꢈꢉaꢊꢁ ꢁutꢁctꢂcaꢉꢉy ꢄꢆ ꢅꢂtꢀ
cꢄꢊductꢂvꢁ ꢁꢈꢄxy (ꢃꢁꢁ hmC gꢁꢊꢁꢆaꢉ haꢊdꢉꢂꢊg, mꢄuꢊtꢂꢊg, Bꢄꢊdꢂꢊg nꢄtꢁ).
0.102mm (0.004”) Thick GaAs MMIC
50 oꢀꢇ mꢂcꢆꢄꢃtꢆꢂꢈ tꢆaꢊꢃꢇꢂꢃꢃꢂꢄꢊ ꢉꢂꢊꢁꢃ ꢄꢊ 0.127ꢇꢇ (5 ꢇꢂꢉ) tꢀꢂck aꢉuꢇꢂꢊa
tꢀꢂꢊ fiꢉꢇ ꢃubꢃtꢆatꢁꢃ aꢆꢁ ꢆꢁcꢄꢇꢇꢁꢊdꢁd ꢋꢄꢆ bꢆꢂꢊgꢂꢊg rf tꢄ aꢊd ꢋꢆꢄꢇ tꢀꢁ cꢀꢂꢈ
(fꢂguꢆꢁ 1). iꢋ 0.254ꢇꢇ (10 ꢇꢂꢉ) tꢀꢂck aꢉuꢇꢂꢊa tꢀꢂꢊ fiꢉꢇ ꢃubꢃtꢆatꢁꢃ ꢇuꢃt bꢁ
uꢃꢁd, tꢀꢁ dꢂꢁ ꢃꢀꢄuꢉd bꢁ ꢆaꢂꢃꢁd 0.150ꢇꢇ (6 ꢇꢂꢉꢃ) ꢃꢄ tꢀat tꢀꢁ ꢃuꢆꢋacꢁ ꢄꢋ tꢀꢁ
dꢂꢁ ꢂꢃ cꢄꢈꢉaꢊaꢆ ꢅꢂtꢀ tꢀꢁ ꢃuꢆꢋacꢁ ꢄꢋ tꢀꢁ ꢃubꢃtꢆatꢁ. oꢊꢁ ꢅay tꢄ accꢄꢇꢈꢉꢂꢃꢀ
tꢀꢂꢃ ꢂꢃ tꢄ attacꢀ tꢀꢁ 0.102ꢇꢇ (4 ꢇꢂꢉ) tꢀꢂck dꢂꢁ tꢄ a 0.150ꢇꢇ (6 ꢇꢂꢉ) tꢀꢂck
ꢇꢄꢉybdꢁꢊuꢇ ꢀꢁat ꢃꢈꢆꢁadꢁꢆ (ꢇꢄꢉy-tab) ꢅꢀꢂcꢀ ꢂꢃ tꢀꢁꢊ attacꢀꢁd tꢄ tꢀꢁ
gꢆꢄuꢊd ꢈꢉaꢊꢁ (fꢂguꢆꢁ 2).
Wire Bond
0.076mm
(0.003”)
RF Ground Plane
mꢂcꢆꢄꢃtꢆꢂꢈ ꢃubꢃtꢆatꢁꢃ ꢃꢀꢄuꢉd bꢆꢄugꢀt aꢃ cꢉꢄꢃꢁ tꢄ tꢀꢁ dꢂꢁ aꢃ ꢈꢄꢃꢃꢂbꢉꢁ ꢂꢊ
ꢄꢆdꢁꢆ tꢄ ꢇꢂꢊꢂꢇꢂzꢁ bꢄꢊd ꢅꢂꢆꢁ ꢉꢁꢊgtꢀ. Tyꢈꢂcaꢉ dꢂꢁ-tꢄ-ꢃubꢃtꢆatꢁ ꢃꢈacꢂꢊg ꢂꢃ
0.076ꢇꢇ tꢄ 0.152 ꢇꢇ (3 tꢄ 6 ꢇꢂꢉꢃ).
0.127mm (0.005”) Thick Alumina
Thin Film Substrate
Figure 1.
Handling Precautions
Follow these precautions to avoid permanent damage.
0.102mm (0.004”) Thick GaAs MMIC
Storage: Aꢉꢉ baꢆꢁ dꢂꢁ aꢆꢁ ꢈꢉacꢁd ꢂꢊ ꢁꢂtꢀꢁꢆ waꢋꢋꢉꢁ ꢄꢆ Gꢁꢉ baꢃꢁd esD
ꢈꢆꢄtꢁctꢂvꢁ cꢄꢊtaꢂꢊꢁꢆꢃ, aꢊd tꢀꢁꢊ ꢃꢁaꢉꢁd ꢂꢊ aꢊ esD ꢈꢆꢄtꢁctꢂvꢁ bag ꢋꢄꢆ
ꢃꢀꢂꢈꢇꢁꢊt. oꢊcꢁ tꢀꢁ ꢃꢁaꢉꢁd esD ꢈꢆꢄtꢁctꢂvꢁ bag ꢀaꢃ bꢁꢁꢊ ꢄꢈꢁꢊꢁd, aꢉꢉ dꢂꢁ
ꢃꢀꢄuꢉd bꢁ ꢃtꢄꢆꢁd ꢂꢊ a dꢆy ꢊꢂtꢆꢄgꢁꢊ ꢁꢊvꢂꢆꢄꢊꢇꢁꢊt.
Wire Bond
0.076mm
(0.003”)
Cleanliness: haꢊdꢉꢁ tꢀꢁ cꢀꢂꢈꢃ ꢂꢊ a cꢉꢁaꢊ ꢁꢊvꢂꢆꢄꢊꢇꢁꢊt. Do noT attꢁꢇꢈt
tꢄ cꢉꢁaꢊ tꢀꢁ cꢀꢂꢈ uꢃꢂꢊg ꢉꢂquꢂd cꢉꢁaꢊꢂꢊg ꢃyꢃtꢁꢇꢃ.
RF Ground Plane
Static Sensitivity: fꢄꢉꢉꢄꢅ esD ꢈꢆꢁcautꢂꢄꢊꢃ tꢄ ꢈꢆꢄtꢁct agaꢂꢊꢃt esD
ꢃtꢆꢂkꢁꢃ.
0.150mm (0.005”) Thick
Moly Tab
Transients: suꢈꢈꢆꢁꢃꢃ ꢂꢊꢃtꢆuꢇꢁꢊt aꢊd bꢂaꢃ ꢃuꢈꢈꢉy tꢆaꢊꢃꢂꢁꢊtꢃ ꢅꢀꢂꢉꢁ bꢂaꢃ ꢂꢃ
aꢈꢈꢉꢂꢁd. Uꢃꢁ ꢃꢀꢂꢁꢉdꢁd ꢃꢂgꢊaꢉ aꢊd bꢂaꢃ cabꢉꢁꢃ tꢄ ꢇꢂꢊꢂꢇꢂzꢁ ꢂꢊductꢂvꢁ ꢈꢂck-uꢈ.
0.254mm (0.010”) Thick Alumina
Thin Film Substrate
Figure 2.
General Handling: haꢊdꢉꢁ tꢀꢁ cꢀꢂꢈ aꢉꢄꢊg tꢀꢁ ꢁdgꢁꢃ ꢅꢂtꢀ a vacuuꢇ cꢄꢉꢉꢁt
ꢄꢆ ꢅꢂtꢀ a ꢃꢀaꢆꢈ ꢈaꢂꢆ ꢄꢋ bꢁꢊt tꢅꢁꢁzꢁꢆꢃ. Tꢀꢁ ꢃuꢆꢋacꢁ ꢄꢋ tꢀꢁ cꢀꢂꢈ ꢀaꢃ ꢋꢆagꢂꢉꢁ aꢂꢆ bꢆꢂdgꢁꢃ aꢊd ꢃꢀꢄuꢉd ꢊꢄt bꢁ tꢄucꢀꢁd ꢅꢂtꢀ
vacuuꢇ cꢄꢉꢉꢁt, tꢅꢁꢁzꢁꢆꢃ, ꢄꢆ fiꢊgꢁꢆꢃ.
Mounting
Tꢀꢁ cꢀꢂꢈ ꢂꢃ back-ꢇꢁtaꢉꢉꢂzꢁd aꢊd caꢊ bꢁ dꢂꢁ ꢇꢄuꢊtꢁd ꢅꢂtꢀ Ausꢊ ꢁutꢁctꢂc ꢈꢆꢁꢋꢄꢆꢇꢃ ꢄꢆ ꢅꢂtꢀ ꢁꢉꢁctꢆꢂcaꢉꢉy cꢄꢊductꢂvꢁ ꢁꢈꢄxy.
Tꢀꢁ ꢇꢄuꢊtꢂꢊg ꢃuꢆꢋacꢁ ꢃꢀꢄuꢉd bꢁ cꢉꢁaꢊ aꢊd flat.
eutꢁctꢂc Dꢂꢁ Attacꢀ: A 80/20 gꢄꢉd tꢂꢊ ꢈꢆꢁꢋꢄꢆꢇ ꢂꢃ ꢆꢁcꢄꢇꢇꢁꢊdꢁd ꢅꢂtꢀ a ꢅꢄꢆk ꢃuꢆꢋacꢁ tꢁꢇꢈꢁꢆatuꢆꢁ ꢄꢋ 255 °C aꢊd a tꢄꢄꢉ
tꢁꢇꢈꢁꢆatuꢆꢁ ꢄꢋ 265 °C. wꢀꢁꢊ ꢀꢄt 90/10 ꢊꢂtꢆꢄgꢁꢊ/ꢀydꢆꢄgꢁꢊ gaꢃ ꢂꢃ aꢈꢈꢉꢂꢁd, tꢄꢄꢉ tꢂꢈ tꢁꢇꢈꢁꢆatuꢆꢁ ꢃꢀꢄuꢉd bꢁ 290 °C. Do
noT ꢁxꢈꢄꢃꢁ tꢀꢁ cꢀꢂꢈ tꢄ a tꢁꢇꢈꢁꢆatuꢆꢁ gꢆꢁatꢁꢆ tꢀaꢊ 320 °C ꢋꢄꢆ ꢇꢄꢆꢁ tꢀaꢊ 20 ꢃꢁcꢄꢊdꢃ. nꢄ ꢇꢄꢆꢁ tꢀaꢊ 3 ꢃꢁcꢄꢊdꢃ ꢄꢋ
ꢃcꢆubbꢂꢊg ꢃꢀꢄuꢉd bꢁ ꢆꢁquꢂꢆꢁd ꢋꢄꢆ attacꢀꢇꢁꢊt.
eꢈꢄxy Dꢂꢁ Attacꢀ: Aꢈꢈꢉy a ꢇꢂꢊꢂꢇuꢇ aꢇꢄuꢊt ꢄꢋ ꢁꢈꢄxy tꢄ tꢀꢁ ꢇꢄuꢊtꢂꢊg ꢃuꢆꢋacꢁ ꢃꢄ tꢀat a tꢀꢂꢊ ꢁꢈꢄxy fiꢉꢉꢁt ꢂꢃ ꢄbꢃꢁꢆvꢁd
aꢆꢄuꢊd tꢀꢁ ꢈꢁꢆꢂꢇꢁtꢁꢆ ꢄꢋ tꢀꢁ cꢀꢂꢈ ꢄꢊcꢁ ꢂt ꢂꢃ ꢈꢉacꢁd ꢂꢊtꢄ ꢈꢄꢃꢂtꢂꢄꢊ. Cuꢆꢁ ꢁꢈꢄxy ꢈꢁꢆ tꢀꢁ ꢇaꢊuꢋactuꢆꢁꢆ’ꢃ ꢃcꢀꢁduꢉꢁ.
Wire Bonding
Baꢉꢉ ꢄꢆ ꢅꢁdgꢁ bꢄꢊd ꢅꢂtꢀ 0.025ꢇꢇ (1 ꢇꢂꢉ) dꢂaꢇꢁtꢁꢆ ꢈuꢆꢁ gꢄꢉd ꢅꢂꢆꢁ. Tꢀꢁꢆꢇꢄꢃꢄꢊꢂc ꢅꢂꢆꢁbꢄꢊdꢂꢊg ꢅꢂtꢀ a ꢊꢄꢇꢂꢊaꢉ ꢃtagꢁ
tꢁꢇꢈꢁꢆatuꢆꢁ ꢄꢋ 150 °C aꢊd a baꢉꢉ bꢄꢊdꢂꢊg ꢋꢄꢆcꢁ ꢄꢋ 40 tꢄ 50 gꢆaꢇꢃ ꢄꢆ ꢅꢁdgꢁ bꢄꢊdꢂꢊg ꢋꢄꢆcꢁ ꢄꢋ 18 tꢄ 22 gꢆaꢇꢃ ꢂꢃ
ꢆꢁcꢄꢇꢇꢁꢊdꢁd. Uꢃꢁ tꢀꢁ ꢇꢂꢊꢂꢇuꢇ ꢉꢁvꢁꢉ ꢄꢋ uꢉtꢆaꢃꢄꢊꢂc ꢁꢊꢁꢆgy tꢄ acꢀꢂꢁvꢁ ꢆꢁꢉꢂabꢉꢁ ꢅꢂꢆꢁbꢄꢊdꢃ. wꢂꢆꢁbꢄꢊdꢃ ꢃꢀꢄuꢉd bꢁ
ꢃtaꢆtꢁd ꢄꢊ tꢀꢁ cꢀꢂꢈ aꢊd tꢁꢆꢇꢂꢊatꢁd ꢄꢊ tꢀꢁ ꢈackagꢁ ꢄꢆ ꢃubꢃtꢆatꢁ. Aꢉꢉ bꢄꢊdꢃ ꢃꢀꢄuꢉd bꢁ aꢃ ꢃꢀꢄꢆt aꢃ ꢈꢄꢃꢃꢂbꢉꢁ <0.31ꢇꢇ
(12 ꢇꢂꢉꢃ).
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Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
1 - 6
Application Support: Phone: 978-250-3343 or apps@hittite.com