Wednesday, December 24, 2003

Assalamualaikum semer...,

Hehe... sehat ke belake? Mie sinning ok jer sokmo... sehat walafiat, nih musti sbb mase kecik2 selalu guna minyok Afiat aa nih. Lamer doh Mie dok antor e-mail... so mlm nih try aa tulih sket, kebetulan tgh cuti sekoloh (winter holiday) sekarang nih dlm 2 minggu. Mie dok gi memane pun, keje part time pun tidak... just lepak buat keje2 yg perlu disiapkan jer aa. Banyak keje woo... mostly pasal study & lab experiment la... banyak sgt mende yg nak difahamakan. Orang biase2 tgk lampu LED kecik kat butang ON tv tu sebagai lampu indicator jer.., kalu bebudak sekolah form 3 buat projek skolah lampu LED kelip2... hehe... teringat time zaman dulu2. Dah besar sket nih, kalu tgk LED tu kena pikir memacam... nampak sampai camane electron band (valence band & conduction band) kat dlm semiconductor material (biasenyer GaAs - Gallium Arsenide) yg menyala kat dlm LED tu. Die nyer structure lagi (double-heterostructure)... penting utk tambahkan kekuatan cahaya. Nih semer benda yg penting utk semiconductor, asas utk semua device yg keluarkan/serap cahaya - laser, fiber-optics cable, photodiode, solar cell, etc. Nih semer bende yg masuk dlm bidang Mie nih, selain dari IC(integrated circuit) atau U(ultra)/V(very)/L(large)-SI(scale-integrated-circuit) devices - MOS,CMOS(complementary-metal-oxide-semiconductor), SOI(silicon-on-insulator), etc.

Banyak sgt mende yg kena belajar... sampai kengkadang kepala jadik cam biol gak aa carik sumber kat libraray. Sekarang nih kalu masuk lebri sekolah tu dah tau dah nombor indeks buku2 physics/chemistry/semiconductor/electronics/materials/atom/nuclear/solid-state/optics semer2. Kakak lebri tu pun sure dah ingat dah muka Mie... mane ade mamat foreign student lagi yg selalu balik malam2, lepas tu slalu lupa antar buku on-time, mmg hampeh sungguh! Hehe... stendert aa, absent-minded sket nak wat camner. Some people might think Mie dah gila2 sket skarang... tapi nak wat camner, dah terpaksa. Takut bebb... Mie sengsorang jer sekarang. Member sorang lagi yg satu course (Electrical & Computer Eng) yg dulu satu kelas ngan Mie skarang dah masuk communication eng, mie plak masuk semiconductor eng. Bebudak foreign students dari vietnam, sri lanka & china satu kelas dulu pun dah amik major lain.. diorang masuk communication, computer. Tinggal Mie jer sengsorang terkedek2 skarang nih, struggle utk masa depan sendiri.

Alamakk... terpanjang plak citer pasal nih, tadi mase awal2 ingat nak citer pasal salji turun, tu jer. Kekeke... kenape lah buleh terlajak masuk topik lain plak nih. Meh aa datang main baling2 salji kat sinning... best wooo, buat patung salji.. letak topi santa-claus. Hehe.. telinga macam nak terserpih jer sbb dah beku nyer pasal. Sejuk2 minum air kopi panas sambil tgk salji turun... best! Minggu lepas Mie join trip lawatan-sambil-belajar ke Shikoku (pulau kat selatan Kobe), naik jambatan gantung terpanjang di dunia (Akashi Kaikyo Bridge). Ade artikel pasal jambatan nih kat dlm Scientific American magazine yg Abg Yie bawak balik dulu, keluar sekali ngan Petronas Twin Tower & Chek Lap Kok Airport. Gi melawat japanese shrine/ tempat2 tradisi jer... bosan gak aa, tapi menarik sbb gi reramai, cuci mata pun sodap! Ahaks! Siap boleh buat video winter sonata lagi... hehe. Malam tu tido hotel... siap pegi mandi Onsen (kolam air panas jepun)/spa lagi. Best wooo!

Okay lah dulu ekk... dah nok pukul 2 doh tu, esok nak bangun pagi pergi landlord agent, nak carik rumah baru utk masuk 1 Feb nih. Rumah yg Mie duduk skarang terbakar dapur ari tu... member serumah lupa tutup api dapur nyer pasal. Dahle takde org lain kat umah mase tu, mujur aa bilik Mie tak angus. Lepas nih Mie duduk 2 org jer, sama ngan Zul Azri (budak Muar dulu se-Jasin, satu course ngan Mie sini yg masuk communication tu). Nak masuk umah baru nih insyaallah abis aa jugak dlm RM6000-RM9000 satu rumah. Nih yg buat Mie bankrap sket nih, mahal cam anak landak! Okay lah, selamat raye krismas aa semer (takde raye lain yg terdekat laa..), slamat tahun baru aa jugak. Doa2 Mie sokmo... Insyaallah slamat sokmo 'walau di mana jua Mie berada' hehe. Balas tau.. jgn tak balas ek. Kirim salam aa semer, wassalam.

[Hmm... kalu nak tgk pasal strained-silicon MOS gate oxide reliability nyer presentation yg Mie buat ari tu boleh aa download powerpoint file nih. Die nyer report Mie takleh tunjuk sbb semer dlm Japanese... lagipun semer tu confidential document. Presentation nih boleh la tunjuk, lagipun banyak gambar.] Please "right-click" your mouse on the link and "save target as..." to get it. Ade gambar struktur MOS (metal-oxide-semiconductor). Mende bulat yg berkilat2 dlm gambar tu org panggi wafer (yg nih 8 inci or 200mm diameter), channel-length atau gate-length setiap MOS dlm experiment nih saiz 50nm (nano-meter, 1nanometer sama dgn 1meter bahagi satu bilion, atau 1milimeter bahagi sejuta... cek aa pembaris). Cip Intel sekarang still 130nm... lagi pendek gate nih, lagi cepat & lagi rendah power consumption & lagi kecik & lagi banyak transistor boleh masuk dlm satu cip.
http://www.mystudents.org/~shuhaimi/files/NEC_Internship_Presentation-English.ppt

Kat bawah nih penerangan sket pasal strained Silicon. Gambar electron microscopy (mikroskop elektron) yg dua kat bahagian atas tu lah SOI (silicon-on-insulator) tuh.



Strained Silicon at a glance
The image on the left shows electrons flowing through a current silicon chip.On the right is an image of electrons flowing through "strained silicon". The electrons flow up to 70 percent faster through strained silicon because there is less resistance, resulting in chip speed increases of up to 35 percent. Scientists are able to strain, or stretch the silicon by taking advantage of the natural tendency of atoms inside of different crystals to align with one another. When silicon is deposited on top of another material which has atoms spaced farther apart -- in this case, silicon germanium -- the atoms in silicon stretch to line up with the atoms beneath.
The image on the left shows an array of atoms in a silicon lattice (top) and a silicon germanium lattice (bottom). Note the distance in the silicon germanium lattice is spread farther apart than in the silicon. The image on the right shows when we put silicon on top of silicon germanium, the atoms in the silicon stretch, or "strain" to align with the atoms in the silicon germanium. In the strained silicon, electrons experience less resistance and flow up to 70 percent faster, which can lead to chips that are up to 35 percent faster -- without having to shrink the size of transistors.

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