MATERIAL
65286
-/21+
全新原裝現(xiàn)貨,長期供應(yīng),免費送樣
MATERIAL
225080
new and original.quality assurance one year./2016+
原裝現(xiàn)貨長期供應(yīng)
MATERIAL
5000
new and original.quality assurance one year./23+
優(yōu)勢產(chǎn)品大量庫存原裝現(xiàn)貨
MATERIAL
5000
new and original.quality assurance one year./24+
優(yōu)勢渠道現(xiàn)貨,提供一站式配單服務(wù)
MATERIAL
53000
new and original.quality assurance one year./2025+
原裝現(xiàn)貨
MATERIAL
10000
new and original.quality assurance one year./25+
有上有貨原裝現(xiàn)貨可看貨,提供配單服務(wù)
MATERIAL
6608
new and original.quality assurance one year./2024+
現(xiàn)貨假一罰萬只做原裝現(xiàn)貨
MATERIAL
3000
new and original.quality assurance one year./N/A
原裝正品熱賣,價格優(yōu)勢
MATERIAL
80000
-/23+
原裝現(xiàn)貨
MATERIAL
80000
-/23+
原裝現(xiàn)貨
MATERIAL
5240
new and original.quality assurance one year./21+
中研正芯,只做原裝
MATERIAL
228000
NR/2017+
誠研翔科技,配單公司,可開增值稅發(fā)票
MATERIAL
25000
-/2024+
原廠原裝現(xiàn)貨庫存支持當天發(fā)貨
MATERIAL
2000
new and original.quality assurance one year./25+
只做原裝,支持賬期,提供一站式配單服務(wù)
MATERIAL
60701
new and original.quality assurance one year./24+
深圳原裝現(xiàn)貨,可看貨可提供拍照
MATERIAL
228000
NR/2017+
誠研翔科技,專業(yè)配單公司,可開增值稅發(fā)票
MATERIAL
5000
new and original.quality assurance one year./22+
一站式配單,只做原裝
MATERIAL
41101
new and original.quality assurance one year./-
大量現(xiàn)貨,提供一站式配單服務(wù)
MATERIAL
8000
new and original.quality assurance one year./22+
原裝現(xiàn)貨,配單能手
MATERIAL
23412
new and original.quality assurance one year./23+
提供一站式配單服務(wù)
品區(qū)域之外,先將氨氣離化,再轟擊硅烷氣,產(chǎn)生sinx分子沉積在樣品表面。這種設(shè)備目前的主要制造商為德國的roth&rau公司。 (2)直流法:使用直流源激發(fā)等離子體,進一步離化氨氣和硅烷氣。樣品也不與等離子體接觸。這種設(shè)備由荷蘭的otb公司生產(chǎn)。 目前,在中國微波法pecvd系統(tǒng)占據(jù)市場的主流,而管式pecvd系統(tǒng)也占據(jù)不少份額,而島津的板式系統(tǒng)只有5~6條生產(chǎn)線在使用。直流法pecvd系統(tǒng)還沒有進入中國市場。 除了上述幾種模式的pecvd系統(tǒng)外,美國的applied material公司還開發(fā)了磁控濺射pecvd系統(tǒng),該系統(tǒng)使用磁控濺射源轟擊高純硅靶,在氨氣的氣氛中反應(yīng)濺射,形成sinx分子沉積到樣品表面。這種技術(shù)的優(yōu)點是不使用易爆的硅烷氣,安全性提高很多,另外沉積速率很高。 如果按照pecvd系統(tǒng)所使用的頻率范圍,又可將其分成以下幾類: ■ 0 hz:直流間接法——otb公司 ■ 40 khz:centrotherm公司管式直接法pecvd和applied material公司的磁控濺射系統(tǒng) ■ 250 khz:島津公司的板式直接法系統(tǒng) ■
5mm等于0.0256",0.5mm等于0.0197"。 在ipc-sm-782標準內(nèi),每個元件與相應(yīng)的焊盤結(jié)構(gòu)組織在四個頁面中。結(jié)構(gòu)如下: 第一頁包括有關(guān)元件的通用信息,包括可應(yīng)用文件、基本結(jié)構(gòu)、端子或引腳數(shù)量、標記、載體封裝格式、工藝考慮、和焊接阻力。 第二頁包括設(shè)計焊盤結(jié)構(gòu)所必須的元件尺寸,對于其它元件信息,參考eia-pdp-100和95 出版物。 第三頁包括相應(yīng)焊盤結(jié)構(gòu)的細節(jié)與尺寸。為了產(chǎn)生最適合的焊接點條件,在這頁上描述的焊盤結(jié)構(gòu)是基于最大材料情況(mmc, maximum material condition)。使用最小材料情況(lmc, least material condition)時,尺寸可能影響焊接點的形成。 第四頁包括元件與焊盤結(jié)構(gòu)的公差分析。它也提供對于焊接點的形成應(yīng)該期望得到什么的詳細內(nèi)容。焊點強度受錫量的影響。在決定不使用基于mmc尺寸的焊盤結(jié)構(gòu)之前,應(yīng)該進行公差分析和焊接點評估。 來源:ks99
記住,0.65mm等于0.0256",0.5mm等于0.0197"。 在ipc-sm-782標準內(nèi),每個元件與相應(yīng)的焊盤結(jié)構(gòu)組織在四個頁面中。結(jié)構(gòu)如下:第一頁包括有關(guān)元件的通用信息,包括可應(yīng)用文件、基本結(jié)構(gòu)、端子或引腳數(shù)量、標記、載體封裝格式、工藝考慮、和焊接阻力。第二頁包括設(shè)計焊盤結(jié)構(gòu)所必須的元件尺寸,對于其它元件信息,參考eia-pdp-100和95 出版物。第三頁包括相應(yīng)焊盤結(jié)構(gòu)的細節(jié)與尺寸。為了產(chǎn)生最適合的焊接點條件,在這頁上描述的焊盤結(jié)構(gòu)是基于最大材料情況(mmc, maximum material condition)。使用最小材料情況(lmc, least material condition)時,尺寸可能影響焊接點的形成。第四頁包括元件與焊盤結(jié)構(gòu)的公差分析。它也提供對于焊接點的形成應(yīng)該期望得到什么的詳細內(nèi)容。焊點強度受錫量的影響。在決定不使用基于mmc尺寸的焊盤結(jié)構(gòu)之前,應(yīng)該進行公差分析和焊接點評估。 來源:零八我的愛
2.30resin recession 樹脂凹縮 在鍍覆孔孔壁與鉆孔孔壁之間存在的空洞,可以從經(jīng)受高溫后的印制板鍍覆孔顯微切片中看到 2.31scratch 劃痕 2.32bump 凸瘤 導(dǎo)電箔表面的突起物 2.33conductor thickness 導(dǎo)線厚度 2.34minimum annular ring 最小環(huán)寬 2.35registration 重合度 印制板上的圖形,孔或其它特征的位置與規(guī)定的位置的一致性 2.36base material thickness 基材厚度 2.37metal-clad laminate thickness 覆箔板厚度 2.38resin starved area 缺膠區(qū) 層壓板中由于樹脂不足,未能完全浸潤增強材料的部分.表現(xiàn)為光澤差,表面未完全被樹脂覆蓋或露出纖維 2.39resin rich area 富膠區(qū)層壓板表面無增強材料處樹脂明顯變厚的部分,即有樹脂而無增強材料的區(qū)域 2.40gelation particle 膠化顆粒 層壓板中已固化的,通
arket in 2001 as well. with china’s packaging cagr forecast at 26% according to isuppli, china is fast becoming a global powerhouse. the advanced packaging and interconnect alliance (apia) is an association of over 30 leading equipment and process material companies focused on accelerating the development and implementation of commercially viable, comprehensive and risk-free advanced packaging solutions. formed in 2001, the apia concentrates on enhancing the productivity of the equipment and p
te 72、 基板面:real estate 73、 導(dǎo)線面:conductor side 74、 元件面:component side 75、 焊接面:solder side 76、 印制:printing 77、 網(wǎng)格:grid 78、 圖形:pattern 79、 導(dǎo)電圖形:conductive pattern 80、 非導(dǎo)電圖形:non-conductive pattern 81、 字符:legend 82、 標志:mark 二、 基材: 1、 基材:base material 2、 層壓板:laminate 3、 覆金屬箔基材:metal-clad bade material 4、 覆銅箔層壓板:copper-clad laminate (ccl) 5、 單面覆銅箔層壓板:single-sided copper-clad laminate 6、 雙面覆銅箔層壓板:double-sided copper-clad laminate 7、 復(fù)合層壓板:composite laminate 8、 薄層壓板:thin laminate 9、 金屬芯覆銅箔層壓
e 72、 基板面:real estate 73、 導(dǎo)線面:conductor side 74、 元件面:component side 75、 焊接面:solder side 76、 印制:printing 77、 網(wǎng)格:grid 78、 圖形:pattern 79、 導(dǎo)電圖形:conductive pattern 80、 非導(dǎo)電圖形:non-conductive pattern 81、 字符:legend 82、 標志:mark 二、 基材: 1、 基材:base material 2、 層壓板:laminate 3、 覆金屬箔基材:metal-clad bade material 4、 覆銅箔層壓板:copper-clad laminate (ccl) 5、 單面覆銅箔層壓板:single-sided copper-clad laminate 6、 雙面覆銅箔層壓板:double-sided copper-clad laminate 7、 復(fù)合層壓板:composite laminate 8、 薄層壓板:thin laminate 9、 金屬芯覆銅箔層壓
fpc物料中英文對照 fpc 基 材 1、基材:base material 2、層壓板:laminate 3、覆金屬箔基材:metal-clad bade material 4、覆銅箔層壓板:copper-clad laminate (ccl) 5、單面覆銅箔層壓板:single-sided copper-clad laminate 6、雙面覆銅箔層壓板:double-sided copper-clad laminate 7、復(fù)合層壓板:composite laminate 8、薄層壓板:thin laminate 9、金屬芯覆銅箔層壓板:metal core copper-clad laminate 10、金屬基覆銅層壓板:metal base copper-clad laminate 11、撓性覆銅箔絕緣薄膜:flexible copper-clad dielectric film 12、基體材料:basis material 13、預(yù)浸材料:prepreg 14、粘結(jié)片:bonding sheet 15、預(yù)浸粘結(jié)片:preimpregnated bonding sheer
1、aramid fiber 聚醯胺纖維 此聚醯胺纖維系杜邦公司所開發(fā),商品名稱為 kevelar。其強度與軔性都非常好,可用做防彈衣、降落傘或魚網(wǎng)之纖維材料,并能代替玻纖而用于電路板之基材。日本業(yè)者曾用以制成高功能樹脂之膠片(ta-01)與基板 (tl-01),其等熱脹系數(shù)(tce)僅 6ppm/℃,tg 194℃,在尺寸安定性上非常良好,有利于密距多腳smd的焊接可靠度。 2、base material 基材 指板材的樹脂及補強材料部份,可當做為銅線路與導(dǎo)體的載體及絕緣材料。 3、bulge 鼓起,凸出 多指表面的薄層,受到內(nèi)在局部性壓力而向外鼓出,一般對銅皮的展性(ductility)進行試驗時,即使用加色的高壓液體,對其施壓而令銅皮凸起到破裂為止,稱bulge test。 4、butter coat 外表樹脂層 指基板去掉銅皮之后,玻纖布外表的樹脂層而言。 5、catalyzed board,catalyzed substrate(or material) 催化板材 是一種 cc-4(copper complexer #4)加成法制程所用的無銅箔板材,
二、 基材: 1、 基材:base material 2、 層壓板:laminate 3、 覆金屬箔基材:metal-clad bade material 4、 覆銅箔層壓板:copper-clad laminate (ccl) 5、 單面覆銅箔層壓板:single-sided copper-clad laminate 6、 雙面覆銅箔層壓板:double-sided copper-clad laminate 7、 復(fù)合層壓板:composite laminate 8、 薄層壓板:thin laminate 9、 金屬芯覆銅箔層壓板:metal core copper-clad laminate 10、 金屬基覆銅層壓板:metal base copper-clad laminate 11、 撓性覆銅箔絕緣薄膜:flexible copper-clad dielectric film 12、 基體材料:basis material 13、 預(yù)浸材料:prepreg 14、 粘結(jié)片:bonding sheet 15、 預(yù)浸粘結(jié)片:prei
upplies. the device operates in quasi-resonant mode at heavy load to provide high efficiency along with a number of key built-in protection features while minimizing the external component count, simplifying emi design and lowering the total bill of material cost. the iw3620 removes the need for secondary feedback circuitry while achieving excellent line and load regulation. it also eliminates the need for loop compensation components while maintaining stability over all operating conditions. pulse-by-p
h contains pcx graphics format pcb files. figure 3 shows the components layout of the programmer pcb. for printing the prn files on laser printer run the following command, this will print the all pcb files. copy *.prn prn/b for the bill of material of the project view the file pgm89v3partslist.txtthe schematics and the pcbs of the project were designed using orcad softwarfigure 3: components layout of the programmer pcb v3.0softwarepgm89v3.zip file is used to run the programmer. this is a
50ω gain ≥9dbi polarization vertical maximum input power 50w connector type rpsma-male lightning protection dc ground mechanical specifications height (423±2)mm weight 101g radome material abs antenna color black working temperature -40~60℃ 歡迎轉(zhuǎn)載,信息來自維庫電子市場網(wǎng)(m.58mhw.cn)
uperconductors, so are insulators often mistakenly treated as perfect insulators, rather than very high resistances, which is the more accurate model.[018] 有人會把所謂“導(dǎo)體”視為超導(dǎo)體,同樣也會把所謂“絕緣體”看作完全不導(dǎo)電的介質(zhì)。其實準確說來,絕緣體是一些電阻非常大的介質(zhì)。[019] most printed circuit board materials are very good insulators, but they are not perfect, and inadequately cleaned pcb material may be quite a poor insulator. furthermore, pcbs are anisotropic even on a clean pcb different parts of the surface may have different resistivities, and the
winavr20060421 releasedbelow is just a sample of what's new.support for many new processors in the toolchain. new versions of gcc, avr-libc avrdude, srecord, etc. including fixing a major compiler bug. additional new makefile material from carlos lamas for c++ projects, and more material to support building libraries
reports >bill of material
由 mfile生成如下:# hey emacs, this is a -*- makefile -*-#----------------------------------------------------------------------------# winavr makefile template written by eric b. weddington, j鰎g wunsch, et al.## released to the public domain## additional material for this makefile was written by:# peter fleury# tim henigan# colin o'flynn# reiner patommel# markus pfaff# sander pool# frederik rouleau##----------------------------------------------------------------------------# on command line:## make all = ma
key_ch.c reci_ch.c send_ch.c time_ch.c這是我的makefile你對照一下# hey emacs, this is a -*- makefile -*-## winavr sample makefile written by eric b. weddington, j鰎g wunsch, et al.# released to the public domain# please read the make user manual!## additional material for this makefile was submitted by:# tim henigan# peter fleury# reiner patommel# sander pool# frederik rouleau# markus pfaff## on command line:## make all = make software.## make clean = clean out built project files.## make coff = convert elf